Develop Bugs

Yet, another battery life thread?

Hello,
I know all of you have heard this time and time again. I'm sure I'm going to create a huge battle discussion, which I don't want honestly. But I've searched throughout the forums with no luck, and if I've missed this, please direct me and delete the post. So, with that said, hear me out..
I understand apples iPhone's battery tends to last long because of the not so true multitasking, and there are hundreds of ways to make androids battery life significant.
I was just wondering if there was any ROM, kernel, etc to get rid of the "android true multitasking" to increase battery life. Myself as an android user, never tend to use widgets or really have any use for multitasking anyways. I play on facebook, text, and make calls periodically. Anyone want to chime in without blowing my head off on this one?

ICS and JB both have an option under settings/developer options called Background process limit.

creeve4 said:
ICS and JB both have an option under settings/developer options called Background process limit.
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Did not know that. Thank you.
Does this increase battery life, that you know of?

rhodes588 said:
Did not know that. Thank you.
Does this increase battery life, that you know of?
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It increases a lot, but I personally don't recommend that
Sent from my Galaxy Nexus using xda app-developers app

kyokeun1234 said:
It increases a lot, but I personally don't recommend that
Sent from my Galaxy Nexus using xda app-developers app
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Really? Doesn't seem like it would or even that it would increase battery usage since apps have to be restarted every time.
It will definitely free up ram, but that's not really an issue with the GNex.

I should probably also state that I'm on Vicious CM10 w/ stock kernel, and have not yet seen more then 10 hours and 2 hours on screen time.

For my opinion I think depend on lifestyle you use phone

kongkard said:
For my opinion I think depend on lifestyle you use phone
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True, but I only use my phone for browsing facebook, xda, and text messaging. I never play games, use youtube, netflix, or any other battery drainer. I also keep 4g off. I would think I could get more then 10 hours and 2 hour screen time with the 2100 mah extended battery (already exchanged for a new, so it's not the battery)

Battery life cm9

How's the battery life on cm9, is it same as stock i.e. about 2 days per full charge???

harsh.ea said:
How's the battery life on cm9, is it same as stock i.e. about 2 days per full charge???
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For me yes
Sent from my One V using xda app-developers app

maxwen said:
For me yes
Sent from my One V using xda app-developers app
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+1 or even more

Terrible battery life
I'm not completely sure why but for me it has been terrible. Drains to less than 40% in 5-6 hours. I at first thought it was the overclocking I did, then I set the max CPU speed to 1024 MB and it's still terrible battery life. I have wi-fi and data off most of the time and the phone not being used and it still drains this bad. Can someone help me? I've tried a few different governors under the CM9 settings now, which is best? I notice that wi-fi and the screen are using the most power. Why does wi-fi remain on/drain power even when the screen is off? Sense managed to save my battery and make it last for like 2 days (as mentioned in the OP) by turning off wi-fi and data when the phone was asleep/locked. Also, I used auto-brightness on Sense and got the 2 day battery life. Auto-brightness on CM9 seems to be KILLING my battery.
Someone help me get max battery life out of CM9 for my HTC One V (CDMA) please!

swboland said:
I'm not completely sure why but for me it has been terrible. Drains to less than 40% in 5-6 hours. I at first thought it was the overclocking I did, then I set the max CPU speed to 1024 MB and it's still terrible battery life. I have wi-fi and data off most of the time and the phone not being used and it still drains this bad. Can someone help me? I've tried a few different governors under the CM9 settings now, which is best? I notice that wi-fi and the screen are using the most power. Why does wi-fi remain on/drain power even when the screen is off? Sense managed to save my battery and make it last for like 2 days (as mentioned in the OP) by turning off wi-fi and data when the phone was asleep/locked. Also, I used auto-brightness on Sense and got the 2 day battery life. Auto-brightness on CM9 seems to be KILLING my battery.
Someone help me get max battery life out of CM9 for my HTC One V (CDMA) please!
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I was going to give CM9 GMS a shot but maybe I'll wait for a few weeks.

atonz said:
I was going to give CM9 GMS a shot but maybe I'll wait for a few weeks.
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Monkey mentality.... 2 people says yes and one came up with issue with some app sucking his battery, snd result? Another mr perfect with stating about cm9 quality and doubs with no real experience......
Haha, dont install it, your phone will explode...!!

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Hunteres said:
Monkey mentality.... 2 people says yes and one came up with issue with some app sucking his battery, snd result? Another mr perfect with stating about cm9 quality and doubs with no real experience......
Haha, dont install it, your phone will explode...!!
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Actually I had other reasons to wait including concerns about my first flash.
I did end up flashing last night, but not based on the in-depth experience your 1-line reply to this thread described. I actually had any questions I had answered on the IRC channel by a few devs which was highly appreciated.
I don't think there is anything wrong with people waiting for even more stable versions and commenting on that as such. Maybe instead of trying to provoke me through insults you could have tried to convince me. Otherwise your criticism is useless without any sort of construct so please keep it to yourself.

atonz said:
Actually I had other reasons to wait including concerns about my first flash.
I did end up flashing last night, but not based on the in-depth experience your 1-line reply to this thread described. I actually had any questions I had answered on the IRC channel by a few devs which was highly appreciated.
I don't think there is anything wrong with people waiting for even more stable versions and commenting on that as such. Maybe instead of trying to provoke me through insults you could have tried to convince me. Otherwise your criticism is useless without any sort of construct so please keep it to yourself.
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So make some short.research here mate. Cm9 is extremly stable and just a short step to be final, and.almost all developers are focusing on CM10 nowadays. Thats all and seriously there is nothing wrong with CM9 at all - me running it, without single issue

Monkey mentality...
Hunteres said:
Monkey mentality.... 2 people says yes and one came up with issue with some app sucking his battery, snd result? Another mr perfect with stating about cm9 quality and doubs with no real experience......
Haha, dont install it, your phone will explode...!!
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Click to collapse
Exactly what app did I say was sucking my battery? Oh right, I didn't. I asked for help on how to get max battery life with CM9 (like how I should tune the settings) and of course I get someone who thinks they know everything coming in here just to talk **** on someone else. Why did you even bother to post dude? You just wanna call people out and put them down. Does that make you feel better? Insulting people via text on an internet forum? Real cool man... Who's the real mr. perfect here?
That being said...
The ONE AND ONLY issue I have with CM9 is that it seems to be draining battery way too quickly. The first 2 posts claim to get the same battery life as with stock rom (about 2 days). Can someone (someone who actually wants to help here, not someone who just wants to laugh at people who don't have EVERYTHING figured out and perfect like they do) please tell me how they have set up CM9 to get 2 days battery life. I really really like CM9 and the only thing keeping me from using it is this battery drain.

swboland said:
The ONE AND ONLY issue I have with CM9 is that it seems to be draining battery way too quickly. The first 2 posts claim to get the same battery life as with stock rom (about 2 days). Can someone (someone who actually wants to help here, not someone who just wants to laugh at people who don't have EVERYTHING figured out and perfect like they do) please tell me how they have set up CM9 to get 2 days battery life. I really really like CM9 and the only thing keeping me from using it is this battery drain.
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Well, I use JuiceDefender to switch off wifi and 3G when the screen is off. Also, I don't use autobrightness, opting instead to set screen brightness to 20-30% (which is still pretty bright IMO). Been getting 1 and a half days out of the battery with low-mid usage (texting/calling/checking Facebook & Twitter)
However, I've only been using CM9 for about 5 days, so you might want to take my advice with a pinch of salt. Hope this helps anyway.

Poor Battery Life

Hi All,
My Gnex 9250 has a poor battery life, My brother has the same phone and his battery last much longer(with 3g) than mine. Please help.
1130 AM - Battery 100%
1 and half hour Music(Player Pro) - Not much screen activity(with 2G enabled)
2G on for 6 hours, Pretty long texting.
about 45 Minutes of Browsing(2g)
10 Mins on Voice calls.
No Widgets.Background apps = Swiftkey,Go launcher(No theme),Profile scheduler.
By 12am battery was 20%
Screen brigntness is VERY low so its not that, Its about 20%.
Phone is about a month old.
Thanks in advance.
EDIT - 4.1.1(No available updates)

The fact your battery goes over 12hrs seems it's not too bad with moderate use. And who knows if your bro uses his as much as he says? If you want to compare then look at his battery stats in settings next to yours.
Try a different ROM? Kernel?
Sent from my Galaxy Nexus using Tapatalk 2

untruestory said:
The fact your battery goes over 12hrs seems it's not too bad with moderate use. And who knows if your bro uses his as much as he says? If you want to compare then look at his battery stats in settings next to yours.
Try a different ROM? Kernel?
Sent from my Galaxy Nexus using Tapatalk 2
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Thanks for your reply.My brother does use as he said, Ive seen his battery stats, uptime was 1 day 9 hours(14% then). He doesnt text half as much as I do, but his voice calls are much more than mine. Also hes on 3g thats a bigger battery hog than 2g. Not too keen on changing the Kernel/Rom.
Could it be SwiftKey and Go launcher? He doesnt use either of them.
Thanks again.

sl4y3r88 said:
Hi All,
My Gnex 9250 has a poor battery life, My brother has the same phone and his battery last much longer(with 3g) than mine. Please help.
1130 AM - Battery 100%
1 and half hour Music(Player Pro) - Not much screen activity(with 2G enabled)
2G on for 6 hours, Pretty long texting.
about 45 Minutes of Browsing(2g)
10 Mins on Voice calls.
No Widgets.Background apps = Swiftkey,Go launcher(No theme),Profile scheduler.
By 12am battery was 20%
Screen brigntness is VERY low so its not that, Its about 20%.
Phone is about a month old.
Thanks in advance.
EDIT - 4.1.1(No available updates)
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there are lots of thing that can affect your battery life one of it is the kernel ur using.
I already have this problem before.
i've tried lots of custom rom. the only custom rom that solve this battery issues is from Android Revolution HD 7.0.0
from this: http://forum.xda-developers.com/showthread.php?t=1361348

imo the best battery/performance kernel out there is franco's. try it, battery will be 2x to 3x longer.
if you like to fool around with what's chewing battery you can get better battery stats and it will tell you what keeps your phone from going to sleep. sometimes nothing, sometimes crappy app that messes things up
good luck!

Thanks to all for your replies.
Guess that 12 hours is not bad afterall right? Seems like that from the first reply I got.
Unfortunatly I have no time to re-flash a differnt ROM/Kernel. But thanks for all reccomendations.

sl4y3r88 said:
Thanks to all for your replies.
Guess that 12 hours is not bad afterall right? Seems like that from the first reply I got.
Unfortunatly I have no time to re-flash a differnt ROM/Kernel. But thanks for all reccomendations.
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its a smartphone 12 hours is good imo

Buy the Samsung extended battery. It helps a lot.
http://www.ebay.com/itm/Genuine-Sam...462058?pt=PDA_Accessories&hash=item1c222d0cea
http://www.ebay.com/itm/150802739042?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

sl4y3r88 said:
Thanks for your reply.My brother does use as he said, Ive seen his battery stats, uptime was 1 day 9 hours(14% then). He doesnt text half as much as I do, but his voice calls are much more than mine. Also hes on 3g thats a bigger battery hog than 2g. Not too keen on changing the Kernel/Rom.
Could it be SwiftKey and Go launcher? He doesnt use either of them.
Thanks again.
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You say that your brother doesn't text as much as you but he uses voice calls more. Remember that when you're texting the screen is on and that has a big impact on battery life.

There's not a kernel, ROM, or flying saucer out there that can triple battery life Just saying. People get fanatical about certain ROM/kernel combos. The usual suspects are leaving on things you don't need and on occasion an app. People claim that different things work better on different phones but I think it's a bunch of crap. Much of what you hear is placebo.
I'm a fan of Trinity myself
Sent from my Galaxy Nexus using Tapatalk 2

whpsnp said:
You say that your brother doesn't text as much as you but he uses voice calls more. Remember that when you're texting the screen is on and that has a big impact on battery life.
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untruestory said:
There's not a kernel, ROM, or flying saucer out there that can triple battery life Just saying. People get fanatical about certain ROM/kernel combos. The usual suspects are leaving on things you don't need and on occasion an app. People claim that different things work better on different phones but I think it's a bunch of crap. Much of what you hear is placebo.
I'm a fan of Trinity myself
Sent from my Galaxy Nexus using Tapatalk 2
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Both valid points.
Sent from my i9250

[Q] Battery Issue into Crash (probably) ?!

Hey guys
I've been using custom roms for while,when i suddenly realize i have some Crash -
Issues with my
Samsung Galaxy W 4.1.2
Currently Using the Parandroid 2.99
with a 2.6.35.14 CM Kernel by camcory
It simply crashes after a while using it,when i reboot it it shows that my battery has maybe 30 percent or less left.
Waiting 2 minutes my battery shows 67 % for example when i try to use i then it crashes again... or even freeze... *sigh
however i tried flashing a new rom ; wiping the davlik cache ; and wipe battery reset , it still doesnt help...
Does anyone have an Idea where the problem is or better how to fix it??
P.S sry when this thread is posted wrong ,im new here rly couldnt find a topic which suit for this
(btw funny Im a noob Video )
greetz thevuhu

i think u need new battery

A good suggestion is you going pristine, unless your battery is fat, then change your battery.
My phone usually have these problem too, its 96%, I flash something new, wipe stuff, goes into launcher its 14%.
But mine doesn't crash.
Does this happen to other ROM?

Thank you for your help so far
im not sure if my battery is fat or not , well i have to admit it doesnt look that perfect anymore , cuz its slightly "blown up"
do u mean that with fat??
Does this have any dangers for me or the hardware of my galaxy?
yeah i flashed around 3-5 roms already... same issues with all , and it always crashes when i the ram usage is increasing , but as long as i kept my galaxy charging nothing happens at all...

TheVuhu said:
Thank you for your help so far
im not sure if my battery is fat or not , well i have to admit it doesnt look that perfect anymore , cuz its slightly "blown up"
do u mean that with fat??
Does this have any dangers for me or the hardware of my galaxy?
yeah i flashed around 3-5 roms already... same issues with all , and it always crashes when i the ram usage is increasing , but as long as i kept my galaxy charging nothing happens at all...
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Yes, that's a "pregnant"/"fat" battery. Check if you can spin the battery easily on the tabletop.
A good battery is not just flat, it even has a small 'concave' surface.
When your battery can spin easily on top of a flat surface, it's time to buy a new one.
Sent from my GT-I8150 using xda app-developers app

ty very much
yeah its spinning very easy ... -.-
hard to believe that this battery just lived around 1 1/2 year long.
any expreriences / recommendation for the battery?
Should i take an original ?

TheVuhu said:
ty very much
yeah its spinning very easy ... -.-
hard to believe that this battery just lived around 1 1/2 year long.
any expreriences / recommendation for the battery?
Should i take an original ?
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Usually a Lithium battery lasts only around a year, mine is only close to that and its slightly fat too.
Not compulsory, OEM is just as good as long as it doesn't look like its from China LOL(as a chinese I do not feel proud, but oh heck I'm not from China)

TheVuhu said:
ty very much
yeah its spinning very easy ... -.-
hard to believe that this battery just lived around 1 1/2 year long.
any expreriences / recommendation for the battery?
Should i take an original ?
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Original is good, but the capacity is kind of small...
There's a thread in the Accessories subforum discussing a high-capacity 2900 mAh battery. Try take a peek there.
Sent from my GT-I8150 using xda app-developers app

[Q] Battery calibration - Placebo or godsend?

Hi guys -
So I saw in one of the 4.4 ROM threads that someone had used the Battery Calibration app from the Play Store and they claimed it seriously helped their battery life on the geespr. I decided to look at the app in the Store, and I started reading the reviews. I'm perplexed - - many people gave five star reviews claiming it significantly improved their battery life, while others said it did nothing, and a few even said it made their battery WORSE. Then there's the few who have said that wiping the battery stats file (the function that the app fulfills) can't possibly make a difference to your battery life because it only affects how Android reports the battery info. Still further, some say that the battery stats are ALREADY wiped when you flash a new ROM or even just unplug your charger.
So how about it, guys? Can we get a definitive answer about this? Surely our talented devs know the truth?

prowlingfox said:
Hi guys -
So I saw in one of the 4.4 ROM threads that someone had used the Battery Calibration app from the Play Store and they claimed it seriously helped their battery life on the geespr. I decided to look at the app in the Store, and I started reading the reviews. I'm perplexed - - many people gave five star reviews claiming it significantly improved their battery life, while others said it did nothing, and a few even said it made their battery WORSE. Then there's the few who have said that wiping the battery stats file (the function that the app fulfills) can't possibly make a difference to your battery life because it only affects how Android reports the battery info. Still further, some say that the battery stats are ALREADY wiped when you flash a new ROM or even just unplug your charger.
So how about it, guys? Can we get a definitive answer about this? Surely our talented devs know the truth?
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I've been confused by the same thing. I usually recommend doing it when switching between roms. While I can't give you a definite answer, I have also read that wiping the batterystats.bin file does nothing. This thread here says it does absolutely nothing and explains why. That being said, I am one of the people who have noticed significant increases in battery performance from it - which is why I recommend it. Apparently it shouldn't work though! So now the real question is, why the hell did my battery performance increase to such a high degree afterwards, if it does nothing? I didn't use the app, I just deleted the file once my phone hit 100%.
That thread I posted states it is clearly a placebo, and is even backed up by google. It won't hurt so I still do it because like I said Ive noticed an increase. Now Im completely unsure as to why that increase has taken place.
The app also says to let your phone drain to 0% and then recharge uninterrupted back to 100%. It says that it isn't necessary but helpful. Now this could help your battery IF it was a nickel based battery. Since ours in Lithium based, it can actually hurt performance and shorten your batteries life span.

HPTesla said:
Apparently it shouldn't work though! So now the real question is, why the hell did my battery performance increase to such a high degree afterwards, if it does nothing?
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This is a real conundrum :\ and it's going to bug the heck out of me.

prowlingfox said:
This is a real conundrum :\ and it's going to bug the heck out of me.
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Yeah, it appears as if it is simply a placebo. That thread is clear on what that file does and it shouldn't affect performance. Perhaps my increases happened because of changes in charging that just happened to coincide with wiping that file? What I do know is that I was regularly getting 15 hours or so with moderate use. Afterwards it doubled. The longest this battery has lasted for me was a little over 30 hours on a full charge.

HPTesla said:
Yeah, it appears as if it is simply a placebo. That thread is clear on what that file does and it shouldn't affect performance. Perhaps my increases happened because of changes in charging that just happened to coincide with wiping that file? What I do know is that I was regularly getting 15 hours or so with moderate use. Afterwards it doubled. The longest this battery has lasted for me was a little over 30 hours on a full charge.
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It must just be a combination of factors then...which would explain why some people say it helps and some people say it hurts. Seems there's no real clear trend. Thanks for your replies

prowlingfox said:
It must just be a combination of factors then...which would explain why some people say it helps and some people say it hurts. Seems there's no real clear trend. Thanks for your replies
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Eh, no problem, thanks for asking. I've been telling people false info based on misguided observations - and that's never good.

It works for me. I used to get like 11 hour with 3 hr screen time, and now I get 13
Sent from my LG-LS970 using xda app-developers app