Develop Bugs

When you guys unplug your gnex from the wall... (gsm)

Does the battery go to 99% for you guys instantly? seems like mine does, as soon as i unplug it goes to 99%, just wondering if its normal or just my phone, because on my galaxy s II i would get like 30 minutes of no drain, like it would stay at 100 for a while, while this phone is like as soon as i unplug the battery is already down to 99.

unleashed12 said:
Does the battery go to 99% for you guys instantly? seems like mine does, as soon as i unplug it goes to 99%, just wondering if its normal or just my phone, because on my galaxy s II i would get like 30 minutes of no drain, like it would stay at 100 for a while, while this phone is like as soon as i unplug the battery is already down to 99.
Click to expand...
Click to collapse
Calibrate it
Mine stays on 100% for a good half an hour or so too

what is the easiest way to calibrate it? any links.. my GNEX will go 99% instantly too but overall battery drain is awesome

my battery life is TERRIBLE on this thing, it drains like crazy.. i want to calibrate it super badly but im not rooted, so i cant delete batt stats.bin , i even let it drain last night completely charged it again while it was off..still same terrible battery life. its a shame because i really really love this phone.

hiohokaybye said:
Calibrate it
Mine stays on 100% for a good half an hour or so too
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Click to collapse
I'm sorry but that sounds like badly calibrated battery. Lithium-ion Batteries are -never- 100% except for a very brief moment.
It is natural that your phone displays 97%-99% when unplugged (or even when still plugged in). Batteries protect themselves like this, because these batteries cannot be charged while they are full, they will stop charging the very moment you hit 100%.

Generally you don't want your battery to be above 90% for a extended amount of time, that much voltage/capacity speeds up the degradation of the cells. So actually you should be happy, because your battery will have a longer life.
Sent from my Galaxy Nexus using XDA App

Smokeey said:
Generally you don't want your battery to be above 90% for a extended amount of time, that much voltage/capacity speeds up the degradation of the cells. So actually you should be happy, because your battery will have a longer life.
Sent from my Galaxy Nexus using XDA App
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Where are you getting this from? Doesn't make sense.

toonlight said:
Where are you getting this from? Doesn't make sense.
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He's technically correct. LiIon batteries are happiest around 60-70% charge level. However given that your actively using a cell phone battery and your not storing it at high charge its OK.
If you really want to learn more about Lithium tech I can link you to a forum where people are VERY serious about this stuff and use them for high powered lights.

This is a known design "feature."
http://www.androidpolice.com/2010/1...bump-charging-and-inconsistent-battery-drain/
Sent from my Galaxy Nexus using xda premium

Very litlle battery life on my GIO

Hello all,
Am i the only one that is having problems with the battery life on the galaxy gio?
I charged the phone today at 5 in the afternoon, by 8(3 hours after) 70% of battery, charged it with the wall charger and i rebooted it when the battery was full to close all tasks.
In 3 hours without any wifi, only 1 sms received, no calls and no other tasks was executed i lost 30%.
What can i do to improve the battery?
Are you experiencing any similar problems?

Coiso said:
Hello all,
Am i the only one that is having problems with the battery life on the galaxy gio?
I charged the phone today at 5 in the afternoon, by 8(3 hours after) 70% of battery, charged it with the wall charger and i rebooted it when the battery was full to close all tasks.
In 3 hours without any wifi, only 1 sms received, no calls and no other tasks was executed i lost 30%.
What can i do to improve the battery?
Are you experiencing any similar problems?
Click to expand...
Click to collapse
You can wipe battery stats, and turn things like gps wifi data autosync unused apps etc off, for some things you need root acces
Sent from my GT-S5660 using xda premium

What rom you have ?
I have problems with battery life too...but because i play games. Is weird because you didn't do nothing like browsing or play games and your battery was eaten.
Try a full wipe.

Also search the market for PowerTutor, it might be able to help finding what eats your battery, as what you describe this is not normal.

If you've rooted your phone you can calibrate your battery. There's an app for this in the market. It just wipes the battery stats file and creates a new one. I've head that it is good with every rom change to calibrate the battery Hope this helps! GL!

Actually it's good to flash every new ROM when you have fully charged battery. If you fail to do this you'll have to calibrate the battery and it might not be easy to do right the first time.
SO much easier to flash having full power

Battery stats wiping
IIRC google denied that battery stats wiping would actually increase the battery life: http://www.xda-developers.com/andro...-battery-stats-does-not-improve-battery-life/

I assume, you have things like WiFi, BT or GPS turned off... Then you maybe might try another launcher. Samsung's TouchWiz is quite a power eater.

nvlty said:
IIRC google denied that battery stats wiping would actually increase the battery life: http://www.xda-developers.com/andro...-battery-stats-does-not-improve-battery-life/
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Click to collapse
It won't increase battery life, true, but think - when you unplug the charger? When your phone says "100% charged", right? And if your battery starts are wrong the phone may say "I'm charged" when it's actually, say, 40% charged or whatever.
Wiping stats should also provide more accurate battery indicator when it gathers new stats after some usage.

JustVass said:
It won't increase battery life, true, but think - when you unplug the charger? When your phone says "100% charged", right? And if your battery starts are wrong the phone may say "I'm charged" when it's actually, say, 40% charged or whatever.
Wiping stats should also provide more accurate battery indicator when it gathers new stats after some usage.
Click to expand...
Click to collapse
In my experience the battery indicator may work a bit odd (e.g. it goes fast to 40% then stays there for ages). But it didn't keep the battery from charging to full, even when it indicated 100% it still kept charging. But to stay in the topic, clearing the stats might help the "dropping by 30% really fast" issue

Yup, that's what I was talking about - wiping stats won't improve battery life, but might fix indicator accuracy

It could be your background applications eat too much mobile data. Check out your background applications and disable them. Stick with 2G also it improves battery life a lot

if the phone and battery are ok, and you don't have Wifi/BT/3G/EDGE/max_screen_brightness/ or high CPU usage background apps, you should get something like in the attached picture:

AT least for me CM7.2 really improved battery life up to 2 (TWO) days!
Unfortunately CM9 ruined this again and brought it back for ~8h...

esilviu said:
if the phone and battery are ok, and you don't have Wifi/BT/3G/EDGE/max_screen_brightness/ or high CPU usage background apps, you should get something like in the attached picture:
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The z stands for days??
Sent from my GT-S5660 using xda premium

voetbalremco said:
The z stands for days??
Sent from my GT-S5660 using xda premium
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Yes, is romanian language

SilviuMik said:
Yes, is romanian language
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Oh ok..
Z means day, sounds logically.
In dutch we call it 'dag'
Thats kinda good battery life, but also without nearly using your phone
Sent from my GT-S5660 using xda premium

You can use CM 7.2 http://forum.xda-developers.com/showthread.php?t=1381355
It is stable and saves battery better than stock rom.

Another thing to check is that Wifi is set to disable when the screen turns off or when plugged in... If not, you can loose 50% battery life in 6 hours. (Which i did once. NOT FUN.)
As well, apps that sync in the background. Ie, mail checking your inbox every hour for new mail; facebook, twitter, myspace checking for new notifications every hour; leaving apps using GPS running in the background like Navigation, My Tracks, etc. Those sorts of things can drain a battery really quickly, beacuse it has to wake up the phone, get the phone to get the required data over the cellular network then go back to sleep again, instead of just letting the phone sleep.
Another thing you can do is to make sure you kill apps. IE, don't use the home button to exit the app, use the back button. That will kill the app instead of leaving it running in the background.
Its kinda funny, this is all stuff people have mentioned already, but it seriously can be the difference between a half a day and a whole day on a battery...

galaxy nexus battery questions.

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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Click to collapse
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.
Click to expand...
Click to collapse
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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Click to collapse
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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Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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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Click to collapse
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
Click to expand...
Click to collapse
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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Click to collapse
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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Click to collapse
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.
Click to expand...
Click to collapse
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.

Looking for technical answer. Why several charge cycles for ROM to "settle in"?

Looking for technical answer. Why several charge cycles for ROM to "settle in"?
So we all know its a common rule when we flash a new ROM we should give it 2 or 3 full charge cycles to "settle in" before we judge what our battery life will be.
But why?
I did Google it, and really only came up with the conclusion that its common knowledge. "Because thats the way it is". But can someone give a white paper type of reply?

No one can, because it's not true.
It's along the lines of clearing battery stats or calibrating the battery. A Google engineer made a public post that it's all cargo cult nonsense, and that all that's contained in the battery stats is info for generating those pretty graphs in the settings screen, but people around here persist in continuing to do so.

Yeah, it's bull****.
Sent from my SGH-T989 using Tapatalk

More or less the few min on boot thing, is its booting, allows the rom to fully initiate on its own, not 100% needed but does help in the sense that like windows if u open crap while its still booting it can tend to throw the system off a lil bit.
Few batterycycles, bull****.
Clear batterystats?some devices it CAN help, with this phone its pointless, as this phone has a chip to automaticly calibrate the battery anyways.
All these "tips" are more or less worthless to us and can be taken lightly..

Cool thanks guys
edit: manekineko...I search a little but couldnt find it. Can you give me some search terms or a link (if you can find it quickly) to that Google engineer's comments?

blackangst said:
Cool thanks guys
edit: manekineko...I search a little but couldnt find it. Can you give me some search terms or a link (if you can find it quickly) to that Google engineer's comments?
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Click to collapse
Here it is...
https://plus.google.com/u/0/105051985738280261832/posts/FV3LVtdVxPT
and an article that links to the google + above...
http://www.talkandroid.com/83611-go...ats-doesnt-improve-battery-life/#.T2dqChEgelg

G1ForFun said:
Here it is...
https://plus.google.com/u/0/105051985738280261832/posts/FV3LVtdVxPT
and an article that links to the google + above...
http://www.talkandroid.com/83611-go...ats-doesnt-improve-battery-life/#.T2dqChEgelg
Click to expand...
Click to collapse
Thanks! Sig worthy!

now can someone explain why sometimes it takes a long time to drop batt% when it is high but quickly drops when it's in the reds... or the opposite that it drops really quick when its high but lasts forever when it's red
or when you restart your phone.. your battery level sometimes jump or drops drastically
my guess is that sometimes that chip that automatically calibrates and reads your battery is sometime inaccurate after you poweroff/reboot/pull battery.
Just a guess, but I don't really care much about all that nonsense because our phone lasts a damn long time!

Teo032 said:
now can someone explain why sometimes it takes a long time to drop batt% when it is high but quickly drops when it's in the reds... or the opposite that it drops really quick when its high but lasts forever when it's red
or when you restart your phone.. your battery level sometimes jump or drops drastically
my guess is that sometimes that chip that automatically calibrates and reads your battery is sometime inaccurate after you poweroff/reboot/pull battery.
Just a guess, but I don't really care much about all that nonsense because our phone lasts a damn long time!
Click to expand...
Click to collapse
Your battery % is read from the mah left inside the battery, these readings are then translated by the OS into a percsnt based of the max mah on the battery.
Once the percentage is obtained/displayed a new cycle begins, battery drain is completely depentant on the use of the device.
That being said on reboots the first known "cycle" as il refer to it as, is displayed. This first response is usually correct but can vary slightly until the system crosschecks the data.
If that does happen, wit a minute and the system will correct the value in approximately a minute.. hopefully thats clear enough and hope it answeres your question..
Thought i hit post but didnt n left browser open all mornin :/ lmao

doug36 said:
Your battery % is read from the mah left inside the battery, these readings are then translated by the OS into a percsnt based of the max mah on the battery.
Once the percentage is obtained/displayed a new cycle begins, battery drain is completely depentant on the use of the device.
That being said on reboots the first known "cycle" as il refer to it as, is displayed. This first response is usually correct but can vary slightly until the system crosschecks the data.
If that does happen, wit a minute and the system will correct the value in approximately a minute.. hopefully thats clear enough and hope it answeres your question..
Thought i hit post but didnt n left browser open all mornin :/ lmao
Click to expand...
Click to collapse
I have yet to see the system suddenly correct the value. And no i was referring to battery drain with the same usage. They drain differently, it is never a linear drain. And i believe it's more than just measuring the mah left in the battery because a dead battery still has mah. And then there are extended batteries with higher mah. Oh wells.
Sent from my SGH-T989 using xda premium

Teo032 said:
I have yet to see the system suddenly correct the value. And no i was referring to battery drain with the same usage. They drain differently, it is never a linear drain. And i believe it's more than just measuring the mah left in the battery because a dead battery still has mah. And then there are extended batteries with higher mah. Oh wells.
Sent from my SGH-T989 using xda premium
Click to expand...
Click to collapse
No crap, there higher capacity/higher MAH
And No Li-iON battery will die down to 0 MAH...
*edit
And seeing as you obviously don't know how to use google, I saved you the trouble
Terminology: mAh
Definition: The mAh acronym stands for Ampere-hour.
This is a unit of electric charge, and is frequently used in measurements of electrochemical systems such as batteries.
Example: a 2000mAh cell is half the charge capacity of a 4000mAh
If you can't take the answer given, don't ask.
Ofc its not a liniar drain ita based off usage/aps running..
And yes this is called for
Info on batterys
http://www.knowyourmobile.com/glossary/m/513466/mah.html
*EDIT2
Found a plausible way for you to achieve that close to linear drain you so desire:
A.) Install stock rom & kernel,
B.) Root, remove all bloat and ALL apps, as some start automaticly and and are registered as services and last through taskkillers.
C.) Disable ALL sync features, turn on airplane mode.
D.) don't touch phone for a few days..
Should be pretty damn linear for ye

[Q] Unexplainable Battery Life

Here's another battery problem thread guys,
Here's my scenario:
My d2att is rooted and has CyanogenMod 10.1.3 Stable running on it. Nothing has been tweaked in terms of bloatware since CyanogenMod is pretty good about not putting crap on their ROM.
I have a stock 2100 mAh battery from Samsung and a 4200 mAh battery from Hyperion Electronics.
I decided to run tests on each battery on two separate nights to see how they ran. I did this using BetterBatteryStats under the same conditions. I charged each battery to 100%, disabled all radios including GPS, sync, wifi, NFC and Mobile Data and left the phone on over night in a span of 8 hours.
Night 1 - Stock Battery: 100% - 40% in a span of 8 hours with BBS reading "mmc_camera" as the main culprit for battery drain.
Night 2 - Hyperion Batter: 100% - 98% in a span of 8 hours with BBS reading "AudioOut_2" as the top partial wakelock.
My questions are 1) what is "mmc_camera" and why was it keeping my phone awake? and 2) why is there such a dramatic difference in battery drain between the two batteries?
Before anyone tells me, "because the second battery is substantially bigger", I know this. It's essentially 2x the amount of the stock battery. However, based on simple ratios, if the battery is 2x larger than stock, why is the Hyperion battery only draining 1/30th as much as the stock? That doesn't make sense.
Someone please let me know what they can tell me about my problem because I'm seriously sick of trying to power manage my smartphone.

I have noticed this as well it makes no sense? I have the same exact problem you are seeing.
Sent from my SAMSUNG-SGH-I747 using XDA Premium HD app

waiting for the solution.
I had the same problem, any suggestion?
n_alvarez2007 said:
Here's another battery problem thread guys,
Here's my scenario:
My d2att is rooted and has CyanogenMod 10.1.3 Stable running on it. Nothing has been tweaked in terms of bloatware since CyanogenMod is pretty good about not putting crap on their ROM.
I have a stock 2100 mAh battery from Samsung and a 4200 mAh battery from Hyperion Electronics.
I decided to run tests on each battery on two separate nights to see how they ran. I did this using BetterBatteryStats under the same conditions. I charged each battery to 100%, disabled all radios including GPS, sync, wifi, NFC and Mobile Data and left the phone on over night in a span of 8 hours.
Night 1 - Stock Battery: 100% - 40% in a span of 8 hours with BBS reading "mmc_camera" as the main culprit for battery drain.
Night 2 - Hyperion Batter: 100% - 98% in a span of 8 hours with BBS reading "AudioOut_2" as the top partial wakelock.
My questions are 1) what is "mmc_camera" and why was it keeping my phone awake? and 2) why is there such a dramatic difference in battery drain between the two batteries?
Before anyone tells me, "because the second battery is substantially bigger", I know this. It's essentially 2x the amount of the stock battery. However, based on simple ratios, if the battery is 2x larger than stock, why is the Hyperion battery only draining 1/30th as much as the stock? That doesn't make sense.
Someone please let me know what they can tell me about my problem because I'm seriously sick of trying to power manage my smartphone.
Click to expand...
Click to collapse

n_alvarez2007 said:
Here's another battery problem thread guys,
Here's my scenario:
My d2att is rooted and has CyanogenMod 10.1.3 Stable running on it. Nothing has been tweaked in terms of bloatware since CyanogenMod is pretty good about not putting crap on their ROM.
I have a stock 2100 mAh battery from Samsung and a 4200 mAh battery from Hyperion Electronics.
I decided to run tests on each battery on two separate nights to see how they ran. I did this using BetterBatteryStats under the same conditions. I charged each battery to 100%, disabled all radios including GPS, sync, wifi, NFC and Mobile Data and left the phone on over night in a span of 8 hours.
Night 1 - Stock Battery: 100% - 40% in a span of 8 hours with BBS reading "mmc_camera" as the main culprit for battery drain.
Night 2 - Hyperion Batter: 100% - 98% in a span of 8 hours with BBS reading "AudioOut_2" as the top partial wakelock.
My questions are 1) what is "mmc_camera" and why was it keeping my phone awake? and 2) why is there such a dramatic difference in battery drain between the two batteries?
Before anyone tells me, "because the second battery is substantially bigger", I know this. It's essentially 2x the amount of the stock battery. However, based on simple ratios, if the battery is 2x larger than stock, why is the Hyperion battery only draining 1/30th as much as the stock? That doesn't make sense.
Someone please let me know what they can tell me about my problem because I'm seriously sick of trying to power manage my smartphone.
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Try to make sure your front camera sensor is disabled, there's some settings that have the phone look through the camera to see if you are going to wake it up.(something could be in motion settings.)
Or reboot and run the test again. Sometimes the phone glitches out if not rebooted.
Sent from my GT-I9300 using xda app-developers app