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Seems it's normal for Android devices to have poor battery life. So us having poor battery life on our Kaisers is probably due to Android and not the porting of Android to Kaiser.
http://gizmodo.com/5542314/google-i...[of-android-battery]-there-is-something-wrong
According to Larry Page however, if you're not getting a full day's use, there's "something wrong
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buddy of mine has htc hero the phone is awesome if I were on sprint I would buy one, but I have att. anyways his batery life is terrible thats his only complaint
Yes same here, a colleague at work has a Hero, gets a day's use out of it tops, another colleague has flahsed his with 2.1 and says its a lot better, plus he can underclock ther cpu when in 'sleep' mode to save more power, nice.
How is the app called that can underclock in sleepmode ?
thx in advance
My colleague isn't in today, so can't ask him, but a quick google search suggested an app called 'SetCPU' this you can set max and min frequencies at, not free I don't think, but .99p not bad
Actually the poor battery life is a combination of android's power management and the result of us hacking it into hardware it wasn't designed for, however the point is still valid, and is partially due to the differences in the OS itself, which, being linux underneath, has a lot of stuff ticking away unseen.
Best practice, from my experience, is to just plug it into the charger at night, and use it wisely, putting it to sleep when not in use, killing tasks, and not using high drain functions unless needed.
Yea the battery life is dreadful on the android even whilst running on NAND thingy. Before I went sleep it was 81%, when I woke up (i only had a 7hour sleep) it was 65% :|
errrr, 81% to 65% drop in battery really isn't that bad, honestly, when you sleep, your kaiser does not, there are always a few tasks running.
However I usually put my kaiser on charge while I sleep, and I feel it's a good habit to get into with android....
zenity said:
errrr, 81% to 65% drop in battery really isn't that bad, honestly, when you sleep, your kaiser does not, there are always a few tasks running.
However I usually put my kaiser on charge while I sleep, and I feel it's a good habit to get into with android....
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I also do that sometimes, although I have read many places that charging Li-ion batteries more than they need can lead to shorter battery life. I know the batteries internal circuitry cuts the power off at 100% and recharges again when the batterys discharged a bit but from what I've read the best way to do it is to only charge when your battery is discharged a significant amount. I know they're not supposed to have that memory effect, but so many places with different information and I just cant make out which is right and which isn't. Makes me nervous when I'm unsure about small things like this...
Have heard this also, but never had any issues so far, however everything has a limited life, one day my battery or my kaiser will die, i'd prefer it to be my battery
Ah I think I might just switch back to WM6.5 < my battery lasted for so long even when i used it lots. Though once android has a better battery life, I will come back to it! Lol
zenity said:
Have heard this also, but never had any issues so far, however everything has a limited life, one day my battery or my kaiser will die, i'd prefer it to be my battery
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I've always read that's your Li-batteries are best when fully charged all the time (if possible). I never had any battery problems in life.
Could someone please develop a good app that would enable the battery to be drained as much as possible and to charge slower so we could all properly calibrate our batteries?
Do we really need this since it's a Li-ion battery? I know Ni-Mh and Ni-Cad has memory effect, but not on the Li-Ion battery.
I was just wondering the same thing today....simply because there seems to be several different methods to do it. Some say charge 8 hours, turn off, charge and hour, unplug, turn on charge 10 minutes. Then other methods say to do something different....be nice to have an app to walk you through different methods so you know step by step your doing it right
I calibrated mine last night and I'm going to get about 18 hours if not more from it....before yesterday I was getting 9.
The ONLY other different I did was make some profiles on CPU but I cant imagine it would make that much of a difference. I bet its a mix of both
deonjahy said:
Could someone please develop a good app that would enable the battery to be drained as much as possible and to charge slower so we could all properly calibrate our batteries?
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That is to funny I was just saying to my wife the other day that I should make one of these programs seeing that there are none already. I hate having to manually kill my battery every night before I charge it again.
Is it needed? It depends on your school of thought, some say yes, some say no. All I know is that on the few devices I have had in the past, if I constantly plug them in to "top them off" then the battery never ends up lasting very long after a few months of doing that. So I am a believer in killing the battery before charging on devices like these.
So the bottom line is if there is a desire for this, I may try to put an app together for it, as I know myself I am interested I just didn't think many others would be.
All the battery calibration tools, are basically deleting the file... right?
Is it that hard to boot into recovery and wipe battery stats?
deonjahy said:
Could someone please develop a good app that would enable the battery to be drained as much as possible and to charge slower so we could all properly calibrate our batteries?
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I think the second part has to do with hardware. The phones hardware just doesn't have trickle charge implemented and instead lets it drop back down to 90% then starts charging it again.
As for the second part, it came on our phones, even has a default widget. 4G
paulieb81 said:
That is to funny I was just saying to my wife the other day that I should make one of these programs seeing that there are none already. I hate having to manually kill my battery every night before I charge it again.
Is it needed? It depends on your school of thought, some say yes, some say no. All I know is that on the few devices I have had in the past, if I constantly plug them in to "top them off" then the battery never ends up lasting very long after a few months of doing that. So I am a believer in killing the battery before charging on devices like these.
So the bottom line is if there is a desire for this, I may try to put an app together for it, as I know myself I am interested I just didn't think many others would be.
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Um... actually that is (by most accounts) bad for Li-Ion. You want to AVOID completely draining them. All of this stuff is more art than science, but I have way more often heard that completely draining LI batteries is bad. What kills them is the number of cycles they have been through (like -25 +25, -25 +25, -50 +50 would be a full cycle).
You do however want to give them a full up down cycle once in a while (maybe every 1-3 months) for calibration.
Then again, as I said, it is more art than science, and I have heard your method as being better, but the not draining argument seems to be the vast majority.
I'll try to do a little look-see and update this or repost if I find any stronger evidence.
the thing about my phone and battery that ALWAYS baffled me was i would plug it in at night be it at 10% or 22 i would leave plugged in while slept i would wake up unplug and look at battery percentage and it would be like 95.....no other phone has even unplugged and dropped 5 percent by doing nothing????
turn your brightness to 100% and change it so that it never turns off; use wifi tether and play a 720p movie at the same time; oc your kernel to it's highest stable frequency. it'll drain pretty quickly.
I know I might get flamed for this....
Apple suggests, with their laptops, to once a month or so, run the battery completely down. Then let the battery cool down for a little bit. Then give it a full, uninterrupted, overnight charge. I forget if they said to repeat this a second time, then you're good.
This is all from memory of me reading this a couple years ago or so, so our might not be verbatim. Their laptops use lithium ion technology...
(and they used to blow up and melt down too!) Lol!
Wrong word choice and misspelling courtesy of swype.
mykeldrip said:
the thing about my phone and battery that ALWAYS baffled me was i would plug it in at night be it at 10% or 22 i would leave plugged in while slept i would wake up unplug and look at battery percentage and it would be like 95.....no other phone has even unplugged and dropped 5 percent by doing nothing????
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That's because the phone stops charging when it reaches 100%, and runs off of battery probably until it reaches in the low 90s, then charges again. You won't ever notice this because the light will always be green. However, you'll notice that unplugging it a few moments after it turns green, the battery will stay anywhere from 100%-98% for a while. At least on my phone it does.
Is there any way to make this program "auto run" during sleep so it can do everything it needs to do during the night charge (similar to quickpull for blackberry)
laydros said:
I think the second part has to do with hardware. The phones hardware just doesn't have trickle charge implemented and instead lets it drop back down to 90% then starts charging it again.
As for the second part, it came on our phones, even has a default widget. 4G
Um... actually that is (by most accounts) bad for Li-Ion. You want to AVOID completely draining them. All of this stuff is more art than science, but I have way more often heard that completely draining LI batteries is bad. What kills them is the number of cycles they have been through (like -25 +25, -25 +25, -50 +50 would be a full cycle).
You do however want to give them a full up down cycle once in a while (maybe every 1-3 months) for calibration.
Then again, as I said, it is more art than science, and I have heard your method as being better, but the not draining argument seems to be the vast majority.
I'll try to do a little look-see and update this or repost if I find any stronger evidence.
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I am by no means an expert so if you find any reliable info on this and can link us to read, I would love to learn more. All I know is that it is commonly said to drain rechargeable batteries and that I have seen that topping them off very often does lead to battery life degradation.
Tyzing said:
Is there any way to make this program "auto run" during sleep so it can do everything it needs to do during the night charge (similar to quickpull for blackberry)
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There is no need to fully drain the battery. Its purpose in calibration is to configure the software that is correlating voltage to percentage charged. That's all. Regarding the old Apple advice, that is doing the same thing. It will not affect the hardware.
Now, what WILL affect the hardware is charging itself. Every charge/discharge cycle will reduce the total capacity of the battery. This is why the EVO will not cycle on it's own until 10% discharged. It's improving the overall battery life by that restriction.
In short, you will save money overall by getting a higher capacity battery that you don't force to charge too often. Draining your battery does nothing but give you peace of mind and it only really needs recalibrating when it's total capacity has been reduced which isn't often. 3-6 months.
Sent from my PC36100 using XDA App
herbthehammer said:
I know I might get flamed for this....
Apple suggests, with their laptops, to once a month or so, run the battery completely down. Then let the battery cool down for a little bit. Then give it a full, uninterrupted, overnight charge. I forget if they said to repeat this a second time, then you're good.
This is all from memory of me reading this a couple years ago or so, so our might not be verbatim. Their laptops use lithium ion technology...
(and they used to blow up and melt down too!) Lol!
Wrong word choice and misspelling courtesy of swype.
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Yeah except that's not a good idea, it will kill the weak cells.
I understand. Still think it would be useful if it would do the "juice until LED changes" method while sleeping though
paulieb81 said:
So the bottom line is if there is a desire for this, I may try to put an app together for it, as I know myself I am interested I just didn't think many others would be.
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I'm interested!
Btw - what are the charging calibrations people are using? Are you seeing one working better than another?
Im a noob, so take what I say worth a grain of salt but yesterday I did the standard method where you fully charge...turn off...plug back in until led changes green and do it a few times.
I went from 9 hours to 17 hours with no other changes except a few profiles in setCPU.
I did this just last night so my results are fresh.
Tyzing said:
I calibrated mine last night and I'm going to get about 18 hours if not more from it....before yesterday I was getting 9.
The ONLY other different I did was make some profiles on CPU but I cant imagine it would make that much of a difference. I bet its a mix of both
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A few SetCPU profiles is all it takes to see a dramatic increase in battery life, especially while screen off. If you disable it I bet whatever gain you think was from 'calibrating' it disappears.
everyday when I use the galaxy nexus my routine is.
before I sleep, I plug my phone to my phone charger and I pull it out after I wake up. so its basically charging for about 5-7 hours on average.
is this decreasing my battery life? because ever since I had the nexus, I did this and I have never had battery life compared to what people post on xda despite trying out roms/kernels.
so that was my first question.
my second question is, is flashing like getting a new device? after I flash, is the battery life suppose to be bad?
I constantly flash almost every other day and I'm not sure if this is the reason my battery life is so bad.
am I suppose to use my phone for couple weeks before I get good battery life?
btw. I have a cdma galaxy nexus .thanks
Sent from my Galaxy Nexus using XDA App
1°) Is battery life reduced after long charging? This is a good question. I have no proof on that point but I think so. Continuing to keep current going through the battery once fully charged does not improve the battery capacity. The analysis I made on several smartphones shows that some of them stop the current while fully charged ( for example HTC touch Cruise) but most of them keep a charging current.
Samsung smartphones are difficult to analyse because they do not give any data on the current going through the battery
2°) Battery calibration will not improve the battery capacity: Once the battery capacity has been reduced, this is due to chemical changes in the battery, there are no way to repair it. What we could expect is to remove the battery shutdown artefact by adjusting internal parameters of the battery control circuit, so that the state of charge calculus will be more accurate again.
Some more details are given here: http://78michel.unblog.fr/htc-desire-battery-shutdown-analysis/ and in some other pages on this blog
7_michel said:
1°) Is battery life reduced after long charging? This is a good question. I have no proof on that point but I think so. Continuing to keep current going through the battery once fully charged does not improve the battery capacity. The analysis I made on several smartphones shows that some of them stop the current while fully charged ( for example HTC touch Cruise) but most of them keep a charging current.
Samsung smartphones are difficult to analyse because they do not give any data on the current going through the battery
2°) Battery calibration will not improve the battery capacity: Once the battery capacity has been reduced, this is due to chemical changes in the battery, there are no way to repair it. What we could expect is to remove the battery shutdown artefact by adjusting internal parameters of the battery control circuit, so that the state of charge calculus will be more accurate again.
Some more details are given here: http://78michel.unblog.fr/htc-desire-battery-shutdown-analysis/ and in some other pages on this blog
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thanks for the answer to questions1.
but I think I may have written question number 2 in a bad way which was not what I intended. I did not mean to ask if battery calibration increased battery life.
most people already know that it does not.
what I am asking is if battery life is suppose to be calibrated(?) right after you flash a new rom or kernel.
I asked this because I flash a lot and don't get good battery life. I'm not sure if its my device that is the problem or the constant flashing that causes this.
I have currently stopped flashing for 2 days now so I will report back if that was the problem.
anyways thank you for the reply
Sent from my Galaxy Nexus using XDA App
To answer question 2, you do not need to calibrate the battery and flashing roms does not consider your battery bad. The community here does have different opinions on calibration but it wasn't too long ago I read an article where google devs came out and told everyone this isn't really needed.
I have had a droid incredible and now the gnex, and have flashed numerous roms. I have never calibrated my battery and typically experience pretty good battery life AFTER I have played with the phone and set it up and stopped turning on the screen ever 2 minutes
To answer question #1:
The battery is a Lithium Ion battery. Lithium Ion batteries like to be charged. You should keep them above 10% as often as possible and ideally plugged when ever you can. These types of batteries last longer with a constant charge than with out, the full "Drains" kill Lithium Ion batteries faster and should only be done when you are calibrating the device (on the first charge or two).
The confusion comes from the old rechargeable Nickel Cadmium batteries which lasted longer if you did a full charge and discharge as these had a "memory".
As far as question #2 goes that is personal preference. I have flashed my GNex 6 or so times now and have had no issues when I didn't re-calibrate it.
x942 said:
To answer question #1:
The battery is a Lithium Ion battery. Lithium Ion batteries like to be charged. You should keep them above 10% as often as possible and ideally plugged when ever you can. These types of batteries last longer with a constant charge than with out, the full "Drains" kill Lithium Ion batteries faster and should only be done when you are calibrating the device (on the first charge or two).
The confusion comes from the old rechargeable Nickel Cadmium batteries which lasted longer if you did a full charge and discharge as these had a "memory".
As far as question #2 goes that is personal preference. I have flashed my GNex 6 or so times now and have had no issues when I didn't re-calibrate it.
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so are you saying that its good to keep my phone plugged in while I sleep?
Sent from my Galaxy Nexus using XDA App
bluemoon1221 said:
so are you saying that its good to keep my phone plugged in while I sleep?
Sent from my Galaxy Nexus using XDA App
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Yes. Because of the way it the chemical reaction works it is better to keep it charged (plugged in at night).
x942 said:
Yes. Because of the way it the chemical reaction works it is better to keep it charged (plugged in at night).
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ok thanks for the explanation
Sent from my Galaxy Nexus using XDA App
Li-ion batteries decreases in capacity over time NO MATTER WHAT YOU DO. (even if you don't use it)This is the down side in exchange for easy maintenance and high energy density.
In short, just use it normal, charge it when it gets low and stop worrying about the battery life.
bluemoon1221 said:
what I am asking is if battery life is suppose to be calibrated(?) right after you flash a new rom or kernel.
I asked this because I flash a lot and don't get good battery life. I'm not sure if its my device that is the problem or the constant flashing that causes this.
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I am not so clever with my English so I have not fully understood your 2nd question.
Flashing a new rom involve only the smartphone. Calibrating the battery is changing data stored inside the battery IC's memory.
These are two ''independant'' processes. The only relationship between them is that the some roms allows you to write in the battery memory and some others doesn't
What's average battery life you guys are getting with mod use ( variable term)?
x942 said:
To answer question #1:
The battery is a Lithium Ion battery. Lithium Ion batteries like to be charged. You should keep them above 10% as often as possible and ideally plugged when ever you can. These types of batteries last longer with a constant charge than with out, the full "Drains" kill Lithium Ion batteries faster and should only be done when you are calibrating the device (on the first charge or two).
The confusion comes from the old rechargeable Nickel Cadmium batteries which lasted longer if you did a full charge and discharge as these had a "memory".
As far as question #2 goes that is personal preference. I have flashed my GNex 6 or so times now and have had no issues when I didn't re-calibrate it.
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remember 10% is not 10% displayed charge. 0% is about 25% as manufacturers take into consideration battery technologies when designing them. it is also quite dangerous to charge from 0-20% on a Lion battery as the chemical reaction has to be reactivated. and over charging can cause a fire.
All calibrating does is make the battery indicator more accurate, it doesn't increase the charge, the supplied chargers and phone tech will not allow overcharging, and the phone will not discharge a battery to below 25% as battery discharge below 25% will damage the cells.
if you are interested look into Lion charging in the RC world. we need balancing boards with controllers when charging multiple cells, and we have to put them in fire bag just in case. it will give you a greater understanding of how lion and charging works.
monkeypaws said:
What's average battery life you guys are getting with mod use ( variable term)?
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Mine is pretty bad. I max out at 10 hours I'm trying Apex rom now hoping it will be better. Something tells me I need an extended battery.
7_michel said:
I am not so clever with my English so I have not fully understood your 2nd question.
Flashing a new rom involve only the smartphone. Calibrating the battery is changing data stored inside the battery IC's memory.
These are two ''independant'' processes. The only relationship between them is that the some roms allows you to write in the battery memory and some others doesn't
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Exactly right. And our nexus does not give us any access to the chip inside the battery, so there is no need to do any type of calibration with this phone. No roms can change this either due to the max17040 fuel gauge chip inside our batteries.
bluemoon1221 said:
what I am asking is if battery life is suppose to be calibrated(?) right after you flash a new rom or kernel.
I asked this because I flash a lot and don't get good battery life. I'm not sure if its my device that is the problem or the constant flashing that causes this.
Sent from my Galaxy Nexus using XDA App
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You got confused here. You are not calibrating the battery but how the OS interprets the battery data. The battery itself DOESN'T get calibrated. (And you cannot break a battery by flashing ROMs)
There's really nothing much you can do about the capacity of the battery itself as a normal user once it's been made in the factory.
monkeypaws said:
What's average battery life you guys are getting with mod use ( variable term)?
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my battery seems to be only capable of 2 hours of screen time despite using 3g/wifi, no nfc, no bluetooth, no sync, etc.
but I can still live with it.
Sent from my Galaxy Nexus using XDA App
diablous said:
remember 10% is not 10% displayed charge. 0% is about 25% as manufacturers take into consideration battery technologies when designing them. it is also quite dangerous to charge from 0-20% on a Lion battery as the chemical reaction has to be reactivated. and over charging can cause a fire.
All calibrating does is make the battery indicator more accurate, it doesn't increase the charge, the supplied chargers and phone tech will not allow overcharging, and the phone will not discharge a battery to below 25% as battery discharge below 25% will damage the cells.
if you are interested look into Lion charging in the RC world. we need balancing boards with controllers when charging multiple cells, and we have to put them in fire bag just in case. it will give you a greater understanding of how lion and charging works.
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Thanks for that! Didn't know it displayed it differently. I only know how the chemical reaction works and such.
NP fella, thing is Lion is new tech and people still see it by the standards of older battery tech so it's taken for granted that 0% is 0%, and 100% is 100%. where this wouldn't be possible as too many issues would crop up. in RC racing we basically learn it inside out, as Battery types are better for different things. Endurance racing needs Ni-Cad as i prefers a sustained drain and will slow the car near the end of the charge, but keep going with reduced acceleration, while Ni-MH batteries are good, as they have better acceleration due to there properties, but suffer from being fine and suddenly suffering poor acceleration, you have no warning like the last lap. While Li-on are brilliant for one and off acceleration like sprints, or twisty tracks, but run at max power right til the end then just stop dead.
When I got my one x roughly two weeks ago, battery life wasn't really that good. 8 hours max with a couple of hours of screen time. But I always calibrate my battery. When I got it I charged it for 8 hours then drained it then did the same thing for a whole week just using the phone till the battery runs out and then charge it for 5 hours... Now battery life is very good, EASILY last me through a whole day with moderate to heavy usage. Lots of tapatalk 2, browsing, messaging and emails. I'm also running ARHD rom so that also help but nonetheless battery calibration is important so do it people
Never calibrated or whatever, have excellent (for me) battery life.
I thought we got over this myth.....
OP, do you have some supporting evidence, or even logic, that shows that doing exactly what you shouldn't do with a li-po battery has a positive effect?. Have you A /B tested it against another handset where you treated the li-po battery as recommended? I.E, avoiding fully discharging it and preferably charge from around 50%.
I get up to 4 hours screen time and 4-5 days standby having treated the battery this way with just a handful of total discharges (obviously it not always possible to avoid)
farnsbarns said:
OP, do you have some supporting evidence, or even logic, that shows that doing exactly what you shouldn't do with a li-po battery has a positive effect?. Have you A /B tested it against another handset where you treated the li-po battery as recommended? I.E, avoiding fully discharging it and preferably charge from around 50%.
I get up to 4 hours screen time and 4-5 days standby having treated the battery this way with just a handful of total discharges (obviously it not always possible to avoid)
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Do I have evidence? No I didn't capture any screentshots or anything. This is from my personal experience I'm not here to prove to you anything, just sharing how my battery life is improving cause of battery calibration. My phone no longer display for example 25% then soon as I use it jumps to 19% like before. It decreases gradually and I get excellent battery life. Same thing with my I pad when is discharge it completely then recharge it, I see better battery life and better battery % display accuracy.
barondebxl said:
Do I have evidence? No I didn't capture any screentshots or anything. This is from my personal experience I'm not here to prove to you anything, just sharing how my battery life is improving cause of battery calibration. My phone no longer display for example 25% then soon as I use it jumps to 19% like before. It decreases gradually and I get excellent battery life. Same thing with my I pad when is discharge it completely then recharge it, I see better battery life and better battery % display accuracy.
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Li - po batteries do improve with the first few charge cycles but this has nothing to do with the fact you have run it flat. Doing so regularly will shorten the life of the battery. You stated that it had a positive effect but you have no comparison and it flys in the face of the laws of physics and chemistry. The point of my post was to make it clear to anyone who doesn't know better that it's bs and will be detrimental to battery life.
Though LiPo batteries don't like to be overly discharged, I'd stop short of saying that this is detrimental to your battery. LiPo batteries shouldn't be left at low voltage (dead) for long periods of time, but discharging it entirely and then recharging it is well within the designed specs of the battery. It's more the fact that they lose charge over time, and therefore leaving them dead which is considered their minimum safe voltage, will then allow them to drain further themselves over time to a point where it's detrimental. I suppose, though, a battery drained to 0% every single time is more likely to have a shorter life than a battery discharged only to 20% before recharging.
The Android system does calibrate the battery life, which is more of what you'd be doing, but you aren't going to get more battery life out of a battery by discharging it entirely, then charging it fully, it just doesn't work like that. LiPo batteries don't have issues with memory or needing to be discharged or charged to a certain point for optimum performance.
I 100% attribute bad battery life when you first get a phone to simply being you pulling it out and turning it on more than you normally would. It's nearly impossible, and damn near subconscious, but when you get a new toy, you're obviously going to pull it out to look at it, play with it, load every different app it has, etc, as well as doing the same when you show it to people. I think even if you think you didn't play with it a lot when you first got it, you likely still do. But that's just my opinion.
https://plus.google.com/u/0/105051985738280261832/posts/FV3LVtdVxPT
read that calibration not needed
AJerman said:
Though LiPo batteries don't like to be overly discharged, I'd stop short of saying that this is detrimental to your battery. LiPo batteries shouldn't be left at low voltage (dead) for long periods of time, but discharging it entirely and then recharging it is well within the designed specs of the battery. It's more the fact that they lose charge over time, and therefore leaving them dead which is considered their minimum safe voltage, will then allow them to drain further themselves over time to a point where it's detrimental. I suppose, though, a battery drained to 0% every single time is more likely to have a shorter life than a battery discharged only to 20% before recharging.
5
The Android system does calibrate the battery life, which is more of what you'd be doing, but you aren't going to get more battery life out of a battery by discharging it entirely, then charging it fully, it just doesn't work like that. LiPo batteries don't have issues with memory or needing to be discharged or charged to a certain point for optimum performance.
I 100% attribute bad battery life when you first get a phone to simply being you pulling it out and turning it on more than you normally would. It's nearly impossible, and damn near subconscious, but when you get a new toy, you're obviously going to pull it out to look at it, play with it, load every different app it has, etc, as well as doing the same when you show it to people. I think even if you think you didn't play with it a lot when you first got it, you likely still do. But that's just my opinion.
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The dtremental effect will be minute, accepted, but there is certainly nothing to gain. That's what I wanted to make clear.
There is a lot of guesses portrayed as fact on here these days, as well as conclusions drawn from dubious experience with no control or comparisons. Just trying to combat this misinformation.
farnsbarns said:
The dtremental effect will be minute, accepted, but there is certainly nothing to gain. That's what I wanted to make clear.
There is a lot of guesses portrayed as fact on here these days, as well as conclusions drawn from dubious experience with no control or comparisons. Just trying to combat this misinformation.
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I know what you mean. I usually get yelled out when I try to do that and help, haha.
farnsbarns said:
Li - po batteries do improve with the first few charge cycles but this has nothing to do with the fact you have run it flat. Doing so regularly will shorten the life of the battery. You stated that it had a positive effect but you have no comparison and it flys in the face of the laws of physics and chemistry. The point of my post was to make it clear to anyone who doesn't know better that it's bs and will be detrimental to battery life.
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It flys in the face of the laws of physics??!!!??? What the hell are you talking about? I'm talking about my battery life getting better and better cause of draining it and recharging it not the gravity of the moon or Einstein theories, relax.
farnsbarns said:
The dtremental effect will be minute, accepted, but there is certainly nothing to gain. That's what I wanted to make clear.
There is a lot of guesses portrayed as fact on here these days, as well as conclusions drawn from dubious experience with no control or comparisons. Just trying to combat this misinformation.
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LMAO, get out of your basement.
AJerman said:
I know what you mean. I usually get yelled out when I try to do that and help, haha.
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Yep, I just don't care if the truth means a fan of cereal box science gets their knickers in a twist. More than half of what gets posted now is erroneous guess work, assumptive, misleading noise that serves no purpose other than to dilute the factual helpful discussion.
I've never been much good at biting my lip.
farnsbarns said:
Yep, I just don't care if the truth means a fan of cereal box science gets their knickers in a twist. More than half of what gets posted now is erroneous guess work, assumptive, misleading noise that serves no purpose other than to dilute the factual helpful discussion.
I've never been much good at biting my lip.
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That's fascinating..... I wonder where that battery calibration thing started in the first place, I guess someone made that up just to mess with people right?
barondebxl said:
That's fascinating..... I wonder where that battery calibration thing started in the first place, I guess someone made that up just to mess with people right?
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For batteries that needed calibration? And as I said, a lot of people confuse calibrating the battery meter in the OS with calibrating the battery itself.
Read, learn: http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
AJerman said:
For batteries that needed calibration?
Read, learn: http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
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Read this, point 2.
http://osxreality.com/2009/07/18/4-tips-to-extend-your-lithium-battery-life/
To all of you who say that using up your battery shortens it's life, I have just one thing to say: the phone will never let you fully discharge the battery. Approx. 3.5V at which the phone turns off is far from the voltage of fully discharging (and potentially damaging) the battery.
Sent from my HTC One X using xda premium
barondebxl said:
Read this, point 2.
http://osxreality.com/2009/07/18/4-tips-to-extend-your-lithium-battery-life/
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As I said, this has nothing to do with calibrating the battery, and everything to do with calibrating the battery meter in the OS, which, by the way, will never be off by HOURS, maybe by a couple of minutes. This only needs to be done once every however many cycles, that site says 30, but I wouldn't even bother doing it more than once every couple of months at the most as you likely won't see any real gain from doing so, and it IS theoretically bad to overly discharge your phone. Doing it once in a while won't damage anything, but doing it every cycle, or every day for a week or anything like that is excessive, unnecessary, and, as farnsbarns mentioned, can wear on your battery.
Battery meter calibration has been discussed on this message board countless times, and every time it's proven to be nearly pointless in real tests.
Edit: This is not to mention that I think a lot of batteries/phones have charging circuits built into them that allows them to properly check the battery level itself, meaning calibration of the OS isn't necessary. I could be wrong on this, but I'm pretty sure I've read about this before.
AJerman said:
As I said, this has nothing to do with calibrating the battery, and everything to do with calibrating the battery meter in the OS, which, by the way, will never be off by HOURS, maybe by a couple of minutes. This only needs to be done once every however many cycles, that site says 30, but I wouldn't even bother doing it more than once every couple of months at the most as you likely won't see any real gain from doing so, and it IS theoretically bad to overly discharge your phone. Doing it once in a while won't damage anything, but doing it every cycle, or every day for a week or anything like that is excessive, unnecessary, and, as farnsbarns mentioned, can wear on your battery.
Battery meter calibration has been discussed on this message board countless times, and every time it's proven to be nearly pointless in real tests.
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Nothing to do with battery calibration? Have you read the article? If you want accurates readings, you want your battery life to improve, you probably want to calibrate your battery. I've had the one x for almost two weeks and my phone doesn't jump from 50% to 42% randomly anymore cause I've calibrated the battery. If you want more reading : http://www.themobileindian.com/news/5547_How-to-calibrate-smartphone-battery
No one here said that it is something you need to do everyday, but when you get your phone I suggest doing it. Then once it's calibrated do it once a week or every other week.
AJerman said:
Edit: This is not to mention that I think a lot of batteries/phones have charging circuits built into them that allows them to properly check the battery level itself, meaning calibration of the OS isn't necessary. I could be wrong on this, but I'm pretty sure I've read about this before.
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they do have charging circuits I just read it, still you want accurate readings. Even my iPad sometimes displays wrong battery percentage when I don't let it discharge. Sometimes I charge it when it's at like 28% for example, let it fully charge but then it drains weirdly.
barondebxl said:
Nothing to do with battery calibration? Have you read the article? If you want accurates readings, you want your battery life to improve, you probably want to calibrate your battery. I've had the one x for almost two weeks and my phone doesn't jump from 50% to 42% randomly anymore cause I've calibrated the battery. If you want more reading : http://www.themobileindian.com/news/5547_How-to-calibrate-smartphone-battery
No one here said that it is something you need to do everyday, but when you get your phone I suggest doing it. Then once it's calibrated do it once a week or every other week.
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You are failing to listen to what I'm saying. I've read the article, and many others like it. There is no such thing as calibrating Lithium batteries, and it's a common misconception, so I have full faith that you can find countless web pages telling you you can. It comes from the old mindset of batteries that did need certain charge cycles (full discharge, full charge, etc) to maintain life.
Again, the only thing you calibrate when you run the battery all the way down is the OS's battery meter. Android shuts itself down automatically when battery voltage hits a level that is considered empty or dead, regardless of what the battery meter says, so that calibration gives you no more life out of your battery at all.
However, I think we all run down our phones to the point where they auto shutdown more than frequently enough to consider the battery meter calibrated very close at any given time. Battery meter calibration is more an issue on systems that stay plugged in frequently and don't often get discharged, this is usually with laptops used as a desktop replacement, not phones.
We aren't trying to be mean or anything, just trying to squash the continued misconception that calibrating the battery is possible or has any effect.
Hey everyone.
Just wanted to know if charging the tablet almost constantly is a bad thing. I use the tablet a lot every day, so when I'm at 60%, for example, I charge it again while I'm at lunch or doing something else, so that I can keep using the tablet later with full charge available again. I never let my tablet go down to 5%.
Is this bad for the battery in the long run?
Thanks.
Generally, it's best to not allow full cycle recharging...i.e. not fully charge or discharge, it's better for small charge cycles, like 40%<->90%
Some links to help garner some understanding:
http://forum.xda-developers.com/showthread.php?t=2469261
Which provides these links:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
http://www.eetasia.com/STATIC/PDF/200806/EEOL_2008JUN16_POW_TA_01.pdf
http://macomp.ru/wp-content/uploads/2012/04/1607542.pdf
mdamaged said:
Generally, it's best to not allow full cycle recharging...i.e. not fully charge or discharge, it's better for small charge cycles, like 40%<->90%
Some links to help garner some understanding:
http://forum.xda-developers.com/showthread.php?t=2469261
Which provides these links:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
http://www.eetasia.com/STATIC/PDF/200806/EEOL_2008JUN16_POW_TA_01.pdf
http://macomp.ru/wp-content/uploads/2012/04/1607542.pdf
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That's right. At least for what I know. It says the same on Apple's website about batteries. :good:
So then I guess I'm doing it right, correct?
I charge from 60% to 100% or from 50% to 100% again. Maybe I should do it only up to 90% then.
Sensamic said:
So then I guess I'm doing it right, correct?
I charge from 60% to 100% or from 50% to 100% again. Maybe I should do it only up to 90% then.
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I only charge to 100% when I am going to be away from a charger for a long time, otherwise I stop at 90%-ish (my battery app announces when it is at 90% and there are kernels which will stop the charge at what you specify), as the links above state, charging to 100% all the time will shorten the lifetime of your battery, this may or may not matter to someone, for example, if you buy a new tablet every year, or you're well-off financially, then you're probably not too concerned with how many years your battery lasts, in which case charging to 100% a lot won't really matter much, since you'll likely own a newer tablet by time the battery does die.
In short, it's up to you and what you want to get out of your battery's lifetime.
I am using the good old 100% and then use until near 0%. I have found that this way the battery lasts longer.
As I am writing i have 43% battery with 5:40h screen time. I am using Greenify btw.
mulperi said:
I am using the good old 100% and then use until near 0%. I have found that this way the battery lasts longer.
As I am writing i have 43% battery with 5:40h screen time. I am using Greenify btw.
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There are two kinds of battery life. These recommendations are for battery longevity. How long until the battery begins to lose the ability to fully charge.
The article at battery university explains how charging works, and the best way to charge batteries. What you are doing is the opposite of that way. If you think you are going to have your tablet longer than a year, it's worth taking the time to read the articles linked.
There is noting particularly wrong with full charges every time, but there are 'righter' ways to charge.
Sent from my Nexus 7 using XDA Premium 4 mobile app
Is there any kind of battery forming on new nexus7?
I mean i bought nexus 7 and straight from box i rooted,unlocked and installed custom kernel which forbids battery 2 fully charge over 92%...
Should i revert to stock and firstly fully charge my tablet then go to custom kernel or i am good at it right now ? Tnx
ps. (my nexus 7 was on 38% when i put it out of box)
aigaming said:
Is there any kind of battery forming on new nexus7?
I mean i bought nexus 7 and straight from box i rooted,unlocked and installed custom kernel which forbids battery 2 fully charge over 92%...
Should i revery to stock and firstly fully charge my tablet then go to custom kernel or i am good at it right now ? Tnx
ps. (my nexus 7 was on 38% when i put it out of box)
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Based on what I've read, you'd gain no benefit by reverting to stock and charging to 100%, it MAY or may not effect the internal battery calibration, but it does not affect the lifetime or anything.
Also, these kernels usually have a way for you to change the % at which it stops, usually by cat'ing or changing some value that the kernel reads, you could just cat/echo/change 92% to 100%, and let it charge to 100%, then change it back. YMMV.
mdamaged said:
Based on what I've read, you'd gain no benefit by reverting to stock and charging to 100%, it MAY or may not effect the internal battery calibration, but it does not affect the lifetime or anything.
Also, these kernels usually have a way for you to change the % at which it stops, usually by cat'ing or changing some value that the kernel reads, you could just cat/echo/change 92% to 100%, and let it charge to 100%, then change it back. YMMV.
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Tnx m8
The worst thing you can do to lithium-ion batteries is let them discharge completely.
Not letting the lithium-ion batteries discharge more than 10% will increase the cycles by thousands we're talking going from 350 cycles to 4000.
So, ideally, you want to charge your batteries (of this type) after a 10% discharge but we all know that's impossible so the best thing you can do is to charge your tablet everytime you can. Even if it has much battery left.
I knew that allready but i didn't know that it is not good to charge battery to 100 till i came to nexus 7 forums I always charged all my devices to 100% and never had a problem with battery
Sent from my LG-P990 using Tapatalk
aigaming said:
I knew that allready but i didn't know that it is not good to charge battery to 100 till i came to nexus 7 forums I always charged all my devices to 100% and never had a problem with battery
Sent from my LG-P990 using Tapatalk
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You should charge to 100%, there is no problem with that.
On a perfect world you would want to charge everytime the battery hit 90%, this gives the best amount of charge cycles and life time.
However we all know that's not going to happen because the tablet is here to serve our needs and not the other way around so stick to charging it whenever you can.
Great Question!
First let me start off by saying to the person that started this thread that this was a really good question to ask!
Now if you are trying to get the most out of your battery then you could look into installing/flashing a custom kernel that could allow for undervolting which could in theory give your battery more life.
So you all are saying that the best thing to do is to charge up to 90% and never let it get down to less than 10%? Always start charging when the battery gets to like 40%?
One question i have for the Nexus 7 2013. Is it even possible to remove the battery for this tablet or does it void the warranty? Second has anyone purchased a spare battery (if possible) for their Nexus 7 2013? If you did could you post a link to where you got it and let us know how much you paid?...
Great question and thread!
-droidshadow
droidshadow said:
First let me start off by saying to the person that started this thread that this was a really good question to ask!
Now if you are trying to get the most out of your battery then you could look into installing/flashing a custom kernel that could allow for undervolting which could in theory give your battery more life.
So you all are saying that the best thing to do is to charge up to 90% and never let it get down to less than 10%? Always start charging when the battery gets to like 40%?
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There has been speculation in the franco thread that undervolting could actually hurt battery charge life, due to the CPU having to work harder due to having less voltage, not sure if that has any merit or not.
The reasoning behind the not charging above 90%, and not allowing full-cycle charges is outlined much better in the links I posted than I could do here, also I would be just regurgitating information that is already there for the most part.
40% is just a number I pulled out of air, the best practice is to keep the charge delta as small as possible. So, let's say we charge the device to 90%, it is better to charge it when it hits 80% than it is to wait till it hits 70%, because a smaller charge delta has occurred, so charge often, but if you want the lifetime of your battery to be maximized (lifetime as in the way ezas explained it, i.e. "(...)battery longevity. How long until the battery begins to lose the ability to fully charge"), than try to not charge it to 100%.
Also, it has to be said, heat also affects the battery longevity, that is why I also recommend not charging while a device is in its case. And not leaving it sit on a Qi charger for too long, some cause more heat than others, but heat is a battery's enemy.
droidshadow said:
One question i have for the Nexus 7 2013. Is it even possible to remove the battery for this tablet or does it void the warranty? Second has anyone purchased a spare battery (if possible) for their Nexus 7 2013? If you did could you post a link to where you got it and let us know how much you paid?...
Great question and thread!
-droidshadow
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It would no doubt void your warranty. As for battery replacements, I have not yet found one, I'm not saying there isn't one to be found, but I have yet to find it, I figure the reason is because they are not yet in demand since the tablet is relatively new and demands for replacement batteries would be too low, obviously and eventually this will change.
droidshadow said:
First let me start off by saying to the person that started this thread that this was a really good question to ask!
Now if you are trying to get the most out of your battery then you could look into installing/flashing a custom kernel that could allow for undervolting which could in theory give your battery more life.
So you all are saying that the best thing to do is to charge up to 90% and never let it get down to less than 10%? Always start charging when the battery gets to like 40%?
One question i have for the Nexus 7 2013. Is it even possible to remove the battery for this tablet or does it void the warranty? Second has anyone purchased a spare battery (if possible) for their Nexus 7 2013? If you did could you post a link to where you got it and let us know how much you paid?...
Great question and thread!
-droidshadow
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What I said was that, theorically, in a perfect world, you want to charge your tablet when it starts losing charge and ideally never let it get below 90%. This is almost impossible because we use our tablet and we don't want to constantly be charging it so ideally you want to charge it whenever you can.