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So.... following Mikey1022's thread crusade, I'm almost hesitant to post this here, but I feel like I'm going to get the most accurate answer from the people in this forum vs general...
On Cyanogens site, I found this for Battery Recalibration:
Battery recalibration
If you're experiencing higher than normal battery drain, try the following:
1. Charge the phone to full battery; let it keep charging until the battery says it is fully charged. Do not wait until the light is green, it isn't always fully charged, causing a lot of inaccuracies. (You can check by going to: Settings -> About Phone -> Status -> Battery Level = Full.)
2. Boot to recovery mode and go to console (or adb shell) and type:
mount -a
rm /data/system/batterystats.bin
NOTE: Newer Amon_Ra recoveries have an option to delete the battery stats, do this in place of the console commands above.
NOTE: To have the most accurate of battery stats, reboot the phone immediately after wiping the battery stats and wait for CM to boot completely to the desktop. Once your entire boot is done and you have full access to the phone, go ahead and pull the charger and continue with this troubleshooter.
1. Do not charge the phone until after draining the battery completely, resulting in it automatically shutting off.
2. Recharge the phone completely and then use as you normally would.
SO I'm at work, and don't have the option to check this, but unlike "hardware" battery calibration I'm mostly curious about removing the batterystats.bin
Would it help us with our battery woes, or do ours go deeper? For some reason, I noticed that mine's been draining a LOT faster in the past month or so then before...
Any thought?
This belongs in the general area?
I really don't think there's a magic forumula for these LIPO batteries. Unless you have a bad battery, you like numerous others need to join the battery 12 step program. I've already been through it. "Hello, my name is Sean and I'm obsessed with my battery life."
Long story short, just keep charge the battery when it gets low. If you work near an outlet or computer, and sleep near one - it's quite easy to keep the battery up throughout the day.
FYI, I've read up on this a bit regarding laptop batteries. It has nothing to do with the actual battery life or the "memory effect" (these batteries don't have a memory effect). It has to do with the OS's interpretation of the battery's performance and how it is reported to the user. So you're really recalibrating Android, not the physical battery. As far as I've read, this only "needs" to be done once in a great while, once a year maybe. Or if you notice something really odd with the battery level reporting.
I did this this morning as well since my phone was fully charged and ready to try it. Not had any hugely bad side effects from the phone and new battery (1750), but we will see if this changes anything.
wraithdu said:
FYI, I've read up on this a bit regarding laptop batteries. It has nothing to do with the actual battery life or the "memory effect" (these batteries don't have a memory effect). It has to do with the OS's interpretation of the battery's performance and how it is reported to the user. So you're really recalibrating Android, not the physical battery. As far as I've read, this only "needs" to be done once in a great while, once a year maybe. Or if you notice something really odd with the battery level reporting.
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Click to collapse
Well, actually, that's why I put it in the development forum. These instructions are telling us to remove things from the system. Also on that note, my battery went from being at 30% full by 10pm (fully charged in the morning) to 30% full by 3pm (YES, 3) so something is definitely wrong, not just "I am obsessed with my battery life". Mind you, I'm at work until 2, so my phone drains to 30% on IDLE, with screen off. I was thinking maybe Android is misinterpreting something? I removed all programs that I thought might be causing this, turned off wifi, bt, gps, still no go. Maybe bad battery?
What I'm thinking this may help with is the fully charged issue the incredible has. I wouldn't follow the above instructions exactly however. Let me explain.
If you've ever noticed, the OS doesn't report "fully charged" correctly. Charge your battery to full (where both the green light comes on AND the "about phone" battery status says "Full". Now shut your phone off, you'll notice your light turns orange again, and will charge for about 30 minutes, sometimes more depending on how far off the battery is. If you turn on your phone after this, you'll notice you stay at 100% for quite some time. This is the case with a lot of incredibles from what I've seen... It probably has to do with the calibration notated above.
I would say do the calibration noted above, however, charge it the way I just noted (charge to full, shut the phone off, let it finish charging to full...). Then follow the rest of the steps immediately following. Might make a difference.
EDIT: this is probably even more true for the 1750mAh battery.
calibration and such has been discussed but not under its own name on page 3 i explain abit about the lithim ion battery vs nickel cadium.
http://forum.xda-developers.com/showthread.php?t=695472
junjlo said:
calibration and such has been discussed but not under its own name on page 3 i explain abit about the lithim ion battery vs nickel cadium.
http://forum.xda-developers.com/showthread.php?t=695472
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Click to collapse
I was witness to that thread, and yes, you are correct, Lithium Ion batteries do not need to be conditioned, it is useless... However, we are not talking of conditioning, we are talking of proper reporting of battery life through the OS, which IS how Lithium Ion memory works. This is not saying to Cycle your battery 3 times to "condition" it to full potential. It is stating that the OS is not properly calibrated to report the proper life of the battery. If the OS cuts the charging of a Lithium Ion battery because it "thinks" it is at 100% charge, while the battery itself is at 80% (just a random example), then your battery life is going to appear to be shorter than it should. The example posted above would theoretically reset the OS so that when it says the battery is at 100%, it indeed is at 100%, preventing it from cutting a charge before it should. See my post previous post if you are confused. "Conditioning" is an entirely different animal, in which you "train" the batteries memory (in Nickel cad batteries) before utilizing your battery in normal charging operations. Lithium Ion does not have this memory, making "Conditioning" useless.
Moral to the Story here is to fully charge your phone when its off and you don't have to deal with any of these work arounds. Am I right?
buy a second battery and an external charger. I do this with every phone and I always seam to get battery life that is on the high side of what people report
Thank you for correcting that was bit early in the morning thought it was same question.
Sent from my ADR6300 using Tapatalk
I'm trying this and I've seen an improvement already on the stock battery. Been off charge for 8hrs and 13 mins and is still at 70% charge. Figures it holds a charge when you want to run it down!
jermaine151 said:
I'm trying this and I've seen an improvement already on the stock battery. Been off charge for 8hrs and 13 mins and is still at 70% charge. Figures it holds a charge when you want to run it down!
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Click to collapse
What, exactly, are you trying that's giving the improvement? The OP's suggestion of booting into recovery and deleting battery stats, or the other common suggestion of turning phone off for the remainder of the charge? 70% after over 8 hours is FAR better than I'm seeing, and I'd like to see the same results.
alexdw369 said:
What, exactly, are you trying that's giving the improvement? The OP's suggestion of booting into recovery and deleting battery stats, or the other common suggestion of turning phone off for the remainder of the charge? 70% after over 8 hours is FAR better than I'm seeing, and I'd like to see the same results.
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Click to collapse
I charged with the phone off, then went into recovery and deleted the battery stats file. Now I'm trying to discharge it completely.
jermaine151 said:
I charged with the phone off, then went into recovery and deleted the battery stats file. Now I'm trying to discharge it completely.
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Click to collapse
I am doing the same. Will follow up with results in a few days.
alexdw369 said:
What, exactly, are you trying that's giving the improvement? The OP's suggestion of booting into recovery and deleting battery stats, or the other common suggestion of turning phone off for the remainder of the charge? 70% after over 8 hours is FAR better than I'm seeing, and I'd like to see the same results.
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That's awesome! That's great battery life. I might have to try this.
~ IRC: nostradamus ~
EM30996 said:
That's awesome! That's great battery life. I might have to try this.
~ IRC: nostradamus ~
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Click to collapse
Trying it myself tonight. Will post results tomorrow.
I'm trying it to. I will post results.
Sent from my HTC Incredible using Tapatalk
Just tried this method, fully charging the phone when it's off then wiping the battery stats. Hoping it'll fix the annoying problem that the battery doesn't fully charge when the phone is on, although I'm not sure if it even can be fixed -- does anyone know?
I'll update if I remember next time I charge it.
Giving a try
Hey guys. I am also giving this a try today.
I just completely charged my battery last night with it off. This morning I unplugged the charger (while the phone was still off) and plugged back in to make sure that the battery was fully charged. The green light turned orange for a couple of minutes and back to green so I proceeded to boot to recovery and removed the battery file. I am also running a Seidio 1750mah.
I am now up and running. I will post later this afternoon to let you know how it's going.
If this fixes the weird battery bug where the Incredible doesn't charge fully, I will kiss the OP. Seriously.
I've brought my Desire Z back for reparation (Mainboard died and replaced by an official repair center).
I've bringed it with my stock Battery fully loaded (I took it from the charger and 30 minutes later it died). When i picked it up, the battery was totally empty. Nothing in it. The Phone didn't even turned on!
It taked a while on the charger, but finally it turned on and was charged to 100% in normal time.
Since that, I experience a huge battery drain. When I release my phone from the charger on 7.30AM, it is dead on 4.30PM with no use! No SMS, phonecall, nothing. Only Gmail sync.
I've tried different ROM's (With- and without sense) and did restore my phone to stock. It doesn't solve my problem, the drain still stays huge, even with no apps installed!!!
I've tried another battery > same problem!
What can this be? Normally, my Desire Z last about 1,5 days oder 2 days when nothing happens. Why it's draining so fast, even if it's not used?
What can I do to resolve this ??
JassyNL said:
I've brought my Desire Z back for reparation (Mainboard died and replaced by an official repair center).
I've bringed it with my stock Battery fully loaded (I took it from the charger and 30 minutes later it died). When i picked it up, the battery was totally empty. Nothing in it. The Phone didn't even turned on!
It taked a while on the charger, but finally it turned on and was charged to 100% in normal time.
Since that, I experience a huge battery drain. When I release my phone from the charger on 7.30AM, it is dead on 4.30PM with no use! No SMS, phonecall, nothing. Only Gmail sync.
I've tried different ROM's (With- and without sense) and did restore my phone to stock. It doesn't solve my problem, the drain still stays huge, even with no apps installed!!!
I've tried another battery > same problem!
What can this be? Normally, my Desire Z last about 1,5 days oder 2 days when nothing happens. Why it's draining so fast, even if it's not used?
What can I do to resolve this ??
Click to expand...
Click to collapse
try a new battery? Reset battery stats and give it a few days to actually get accurate readings? 8 hours isn't unheard of especially if your battery is giving up the ghost. give those thigns a try and maybe turn off sync and/or data to see if that makes a differance.
killj0y said:
try a new battery? Reset battery stats and give it a few days to actually get accurate readings? 8 hours isn't unheard of especially if your battery is giving up the ghost. give those thigns a try and maybe turn off sync and/or data to see if that makes a differance.
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Thanks! I've already tried a new battery, but that makes no sense.
I'm now draining it to zero, i.e. when it's fully dead, and then charge it to 100% for 8 hours. When it's charged, i'll wipe battery stats. Let's see.
When anybody has more tips, i'm pleased to hear them!
Here's a tip: don't drain your battery to zero. This is a great way to shorten the life of the battery, or completely ruin it.
For purposes of battery meter calibration, draining to 10-20% is plenty sufficient.
There should be no problem draining a battery to zero as shown by software. There is a myth/misunderstanding that this is a bad thing because people confuse it with the fact that Lithium Ion batteries can be permanently damaged if they are drained too low.
BUT any device using such batteries will have its circuitry setup to have 0% set to a point above this damaging threshold.
So the "too low" point in hardware is likely to be below the zero point that the phone's firmware and software will let you go to.
Sent from my Desire Z running CM7.
redpoint73 said:
Here's a tip: don't drain your battery to zero. This is a great way to shorten the life of the battery, or completely ruin it.
For purposes of battery meter calibration, draining to 10-20% is plenty sufficient.
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Click to collapse
x2 I concur with this. No need to fully discharge the battery, one it probably doesn't even fully discharge because I'm pretty sure the software is saving you from yourself, plus when the battery stats are uncalibrated I'm fairly certain it reads as discharged but in fact is only partially thus the calibration is off. Lastly I'm if the opinion that throwing different charge levels works better because it more closely resembles real life charging situations. Also letting it charge for that long does nothing because the phone charges only a trickle when full in order to not ruin the battery, similar to a laptop. Overcharge protection....
Thanks again!
Now I did charge it to full and wiped Battery stats.
After 1hour 30 minutes, it lost 10%. Did only send 2 short mails with Gmail.
Here is the usage chart:
- Screen 54% (Time active 4m 51s), Brightness ~20%
- Mobile Stand-By 20% (Time active 1u 26m 13s)
- Phone inactive 18% (Time Active 1u 21m 21s)
- Gmail 5% (CPU Total 31s, CPU Foreground 25s, enabled 51s)
- Android OS 3% (CPU Total 21s)
CPU is on idle ~10%, as always. I don't see any apps that are burning my battery.
s there something abnormal here?
just compared it with my statistics (running virtuous affinity)...
Mobile Stand-By seems to be very high... i have 4% (time active 2 h 30 m)
maybe radio related?
hoffmas said:
just compared it with my statistics (running virtuous affinity)...
Mobile Stand-By seems to be very high... i have 4% (time active 2 h 30 m)
maybe radio related?
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Click to collapse
This stats come from Virtuous Affinity also. I'd had never had any problems with such a drain with my 'old phone'. As soon as I got it back from the repair center, the battery drain is huge.
I've reflashed the latest radio for my phone, made a Superwipe and made a fresh install of Viruous Affinity. Let's see.
I think that 'Cell Standby' is killing my battery. It is at the top of the usage list with 38% and it's all time active. My phone was left it's charger at 7.15AM, now at 9.00AM it lost 20% of it's battery on idle use only. On 9.00AM, I've turned my phone on airplane mode. Let's see if that works.
I will recover the phone to stock tonight. If this isn't working, I'll return the phone to the store.
Even with the phone on airplane mode the battery is heavily draining. My last escape is to remove the SD Card. If the draining continues, then I will bring my phone back.
Does the battery came hot? Like more than normal?
With temp+cpu app you can monitor your temperature.
Because if on idle the temperature's around 25-28 C, you should be alright.
And then you can consider what steviewevie said; lithium battery can be damaged if you go on a too low voltage. Even if the phone as his ''protection'' to not get the battery to a critical level, the battery can loose power even if its not used.
Lithium ion, its cool but not perfect.
Try a OEM brand new battery.
steviewevie said:
There should be no problem draining a battery to zero as shown by software. There is a myth/misunderstanding that this is a bad thing because people confuse it with the fact that Lithium Ion batteries can be permanently damaged if they are drained too low.
BUT any device using such batteries will have its circuitry setup to have 0% set to a point above this damaging threshold.
So the "too low" point in hardware is likely to be below the zero point that the phone's firmware and software will let you go to.
Click to expand...
Click to collapse
I've seen plenty of people on XDA with this phone and others that have rendered their battery unable to charge by letting it discharge to zero. Yes, there are failsafes meant to prevent over-discharge, but they apparently do not always work. The damage is not "permanent" in that its just the protection circuit of the battery kicking in. But the only way to bring the battery back from "sleeping" is with a special battery meter with boost function, which most people do not have access to. So for all practical purposes, its cheaper to just buy a new battery.
http://batteryuniversity.com/learn/article/low_voltage_cut_off
Yes, over-discharge will not LIKELY kill your battery in this way. But there is no point in taking the risk. The battery meter is far from accurate in the best of conditions. So there is zero benefit to letting the battery drain to zero, as opposed to 10 or 20 %, just for the benefit of calibrating the battery meter.
Also, even if over-discharge does not instantly "kill" the battery, running full cycles at the least will shorten the overall life of the battery. Its best to avoid full cycles and charge often.
http://batteryuniversity.com/learn/article/do_and_dont_battery_table
Now this is just my experience from reading the experiences of others on XDA. I know there are hardware techs that can give much more first hand experience with batteries and may disagree. But as I figure, better safe than sorry. Especially when you consider there is no real benefit to letting it drain to zero on purpose.
oVeRdOsE. said:
Does the battery came hot? Like more than normal?
With temp+cpu app you can monitor your temperature.
Because if on idle the temperature's around 25-28 C, you should be alright.
And then you can consider what steviewevie said; lithium battery can be damaged if you go on a too low voltage. Even if the phone as his ''protection'' to not get the battery to a critical level, the battery can loose power even if its not used.
Lithium ion, its cool but not perfect.
Try a OEM brand new battery.
Click to expand...
Click to collapse
The temp of the battery don't exceed 28 degrees, I test this with Battery Indicator Pro. When discharged, the Voltage is around 3,6 (Which is normal behaviour). When charged, it,s 4,2V which is normal also.
I have already tried a new battery, and it doesn't make sense. Same behaviour.
I'm really clueless, because it drains the battery always. Airplane mode an removal of the SD card makes no difference.
I will return to stock tonight, charge again, and see if it behaves the same. When yes, then I will return the phone as I don't accept such behaviour (Normally, my Battery last 30+ Hours on idle).
Thanks for your tips and help for so far! I will report.
I bought a new battery today, a Chinese knock-off battery which claims to have a capacity over 2000. I live in Mongolia, so that's basically my only option if I want a replacement battery, since there's basically no postal system here.
When I first put in the battery, it showed a 59% charge. After a few minutes and maybe a reboot, it showed a 20% charge. It consistently drained down to zero, and I'm charging it now.
I've experienced really strange battery drain with the former battery (also a Chinese knock-off) where it loses maybe 10 percent an hour on idle, so I figured the battery needs to be replaced. Is there anything I can do to calibrate it? I have a feeling that the charge is actually more than is being shown, but no way to confirm my suspicions. Am I right just to try to charge it to 100% and discharge it to 0% until the battery life gets better, or is there something else to do? I should mention I've tried resetting the battery stats in CWM with no real effect.
Thanks from Mongolia.
Go into recovery when battery is at 100% and go to advanced then clear battery stats or download battery config for rooted devices and clear battery stats that way.
Nelinski said:
Go into recovery when battery is at 100% and go to advanced then clear battery stats or download battery config for rooted devices and clear battery stats that way.
Click to expand...
Click to collapse
Clearing battery stats achieves nothing other than deleting the stats on the what has been using battery power. Battery calibration isn't required on our phones.
duraaraa said:
I bought a new battery today, a Chinese knock-off battery which claims to have a capacity over 2000. I live in Mongolia, so that's basically my only option if I want a replacement battery, since there's basically no postal system here.
When I first put in the battery, it showed a 59% charge. After a few minutes and maybe a reboot, it showed a 20% charge. It consistently drained down to zero, and I'm charging it now.
I've experienced really strange battery drain with the former battery (also a Chinese knock-off) where it loses maybe 10 percent an hour on idle, so I figured the battery needs to be replaced. Is there anything I can do to calibrate it? I have a feeling that the charge is actually more than is being shown, but no way to confirm my suspicions. Am I right just to try to charge it to 100% and discharge it to 0% until the battery life gets better, or is there something else to do? I should mention I've tried resetting the battery stats in CWM with no real effect.
Thanks from Mongolia.
Click to expand...
Click to collapse
if you want to increase battery life for your new battery, charge it fully to 100% whenever you charge it will increase charge storing capacity of the battery
duraaraa said:
I bought a new battery today, a Chinese knock-off battery which claims to have a capacity over 2000. I live in Mongolia, so that's basically my only option if I want a replacement battery, since there's basically no postal system here.
When I first put in the battery, it showed a 59% charge. After a few minutes and maybe a reboot, it showed a 20% charge. It consistently drained down to zero, and I'm charging it now.
I've experienced really strange battery drain with the former battery (also a Chinese knock-off) where it loses maybe 10 percent an hour on idle, so I figured the battery needs to be replaced. Is there anything I can do to calibrate it? I have a feeling that the charge is actually more than is being shown, but no way to confirm my suspicions. Am I right just to try to charge it to 100% and discharge it to 0% until the battery life gets better, or is there something else to do? I should mention I've tried resetting the battery stats in CWM with no real effect.
Thanks from Mongolia.
Click to expand...
Click to collapse
See this post:
http://forum.xda-developers.com/showthread.php?t=1312273
Never, ever I repeat never let your battery drop below around 5%, and always charge it before it reaches zero. I use the Guage Battery widget v3 pro as it is very accurate, but you can also get the free version. You can & should use the free battery calibration tool from the Google play store, simply install it & charge the battery to 100% then run the calibration App. simples
Sent from my GT-I9100 using Tapatalk
My H815 had started reporting strange battery stats. I took it off charge an hour ago, but the battery stats (in Settings) say that the "Usage on battery" is 23 hours. The battery has also started charging more slowly, and discharging more quickly, recently. Does all of this suggest that the battery needs to be replaced?
Not necessarily. I would try a battery calibration and maybe even a factory reset because
itm said:
.. The battery has also started charging more slowly,..
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doesn't fit. Usually batteries on their way to dying discharge *and charge* faster.
Also the report that it's on charger while not, may indicate a software or even hardware problem.
How old?
About 1 year old. I've noticed that it is drawing a lower charging current when connected to the Quick Charge charger (less than 500mA). It used to draw 1000mA+. Also, my car charger no longer keeps it charged when Google Maps is running - i.e. the phone discharges more quickly than the charger charges it.
What's the best way of re-calibrating the battery?
Run it totally empty doing something intensive. When the phone shuts down, wait some time, then power it on again and try to use every last drop of energy. Maybe do this one more time. Just make sure there's nothing left.
(That's the manual way of discharging. There are also apps available that will turn everything on and discharge your battery very fast. But some say they are bad for the battery.)
Then charge to 100% preferably with the phone powered off.
EPa said:
Run it totally empty doing something intensive. When the phone shuts down, wait some time, then power it on again and try to use every last drop of energy. Maybe do this one more time. Just make sure there's nothing left.
(That's the manual way of discharging. There are also apps available that will turn everything on and discharge your battery very fast. But some say they are bad for the battery.)
Then charge to 100% preferably with the phone powered off.
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Click to collapse
You shouldn't do that!
www.batteryuniversity.com
Ciccius-IT said:
You shouldn't do that!
Click to expand...
Click to collapse
We're talking battery calibration here, not everyday practice. Instead of playing smart by providing vague links, be smart by actually reading.
If you want to learn more check http://batteryuniversity.com/learn/article/battery_calibration and many other..
EPa said:
We're talking battery calibration here, not everyday practice. Instead of playing smart by providing vague links, be smart by actually reading.
If you want to learn more check http://batteryuniversity.com/learn/article/battery_calibration and many other..
Click to expand...
Click to collapse
Thanks. So discharging it to the "Low Battery" warning (15%) then recharging to 100% is the correct thing to do?
Well I would say not everything is fixed and absolute.
For example, you also shouldn't charge to 100%.
But, battery and chip manufacturers incorporate this into their designs, so 0% and 100% are not really that, in order to protect the battery, and give the people an easy life. For example, instead of suggesting everyone to remember and stop charging at around 90%, they make the chips report 100% when they're about 90%. The same is also true for 0%.
I would say discharge fully. The low battery warning is a warning for you to not be left without energy when you might need it, not to protect the battery. The internal chips handle that. 0% is not really 0%.
Edit: in the link I provided in my previous post, check figure 3. Among others, you can see in the data provided by a battery "Absolute state of charge" and "Relative state of charge". That's what I'm talking about. We users see the (protective) relative state of charge, not the absolute.
EPa said:
We're talking battery calibration here, not everyday practice. Instead of playing smart by providing vague links, be smart by actually reading.
If you want to learn more check http://batteryuniversity.com/learn/article/battery_calibration and many other..
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Click to collapse
It's difficult for me to write all in English, sorry. Don't wanna to be vague, linked that site only because I know and read it and I like very much what they say.
I think to discharge battery to the lowest possible isn't a good work, even with the relative % indication. For a simple calibration of a li-ion battery I think it's ok to discharge till phone power off then recharge full. Calibration has nothing to do with battery cycle, it's only software problem. The phone has to calibrate % on true capacity of a wear battery.
Discharge, power on, discharge again, power on, discharge even the last drop of energy isn't a good practice in my honest opinion.
Inviato dal mio LG-H815 utilizzando Tapatalk
Ciccius-IT said:
For a simple calibration of a li-ion battery I think it's ok to discharge till phone power off then recharge full.
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Click to collapse
So we agree. Because we are talking about calibration here.
Every day usage is a totally different story. A li-ion battery should not be left to go below ~40%. Also, slow charging is better than fast (you can imagine what this means in relation to Quick Charge and related technologies. Don't use them if you have the time)
But the question was about calibrating.
Yes, we agree, but before you're talking about discharging every single drop of energy from battery to calibrating it. It's that what I mention not to do, it's a bad practice for li-ion battery, even with security chip, and all that for a simple calibration issue. Just my two cents ✌?
Inviato dal mio LG-H815 utilizzando Tapatalk
So, I got an old G3 F400L with a looking good battery physically. No swell and pretty solid. But it dropping fast on any rom or kernel I've installed, including stock.
Tried some battery calibration apps which deleted batterystats.bin, not really help.
What seems to be a little helping is cycling battery charge and discharge fully, from 0% to 100%. And vice versa. Which people consider a bad practice but it did made my battery level reading better anyway. At first the battery would dropping fast to zero from 90%, 60%, 50%, gradually, and now it would drop fast to zero from 20%.
Now something crazy is happening. My battery was emptied for about a hour. Then I switched my phone on and it's suddenly on 4%. I charge it a little to 10% and leave it be. Now it start increasing to 11%, 12% and finally 15%, even though I'am not charge it. And then it dies.
What is actually happening? how do battery reading mechanic works? Is it on kernel, or something lower level? How did something like this could happen?
Battery levels are just estimates. Drop in internal voltage which happens due to the old age is giving you the random readings.
Get a new battery.
engmia said:
Battery levels are just estimates. Drop in internal voltage which happens due to the old age is giving you the random readings.
Get a new battery.
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Any methods to check this? Just to make sure.
Anyway, this drop won't be restored by natural usage in time, or by any kind of method, right?
khnoizer said:
Any methods to check this? Just to make sure.
Anyway, this drop won't be restored by natural usage in time, or by any kind of method, right?
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Click to collapse
I'm sure, but you can double check the battery voltage by attaching a multimeter probe to the terminals.
No, the drops and battery life (and this behaviour in general) will only get worse.
This is very normal and expected of batteries, that's why those devices with non removable batteries don't make any sense (from users buying them perspective, from a manufacturer point of view it's just great since it's less work and more money)! You can find a lot of information about li-ion batteries online.