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My battery life is bad.. Or isn't it?

OP domini99

20th June 2014, 01:39 PM   |  #1  
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My galaxy s2 barely survives a school day


A reboot causes a 5/10% drop, I can literally watch the battery percentage drop while using it.

Using Omni ROM android 4.4.2

How's everybody's battery life on the s2? Any way of improving it?
If it's really that bad and I can't improve it I'm really going to consider buying an external battery.

Writing this post costed me 6%

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20th June 2014, 02:55 PM   |  #2  
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Mine lasts about a day, depending on how much I use it and which apps I have opened. Then again, it's new and I'm sure it could last a bit longer...

Anyway, how old is your battery? Do you have lots of apps installed? Age and plenty of apps caused a 20-30% drop on my old battery (2.5 years) so I went ahead and bought a new one.
20th June 2014, 03:09 PM   |  #3  
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Quote:
Originally Posted by elliejelly

Mine lasts about a day, depending on how much I use it and which apps I have opened. Then again, it's new and I'm sure it could last a bit longer...

Anyway, how old is your battery? Do you have lots of apps installed? Age and plenty of apps caused a 20-30% drop on my old battery (2.5 years) so I went ahead and bought a new one.

battery is 3 months old and my rom is a near fresh installation

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20th June 2014, 03:48 PM   |  #4  
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For a 3 month old battery its not normal, unless you are having more than 4 hours screen on time.
btw, is it an original samsung battery?

you can try flashing different roms, kernels and modems and check your usage. Try BetteryBatteryStats to check if you are having some wakelocks. Greenify the apps which are hogging your resources.
20th June 2014, 05:12 PM   |  #5  
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This may sound crazy, but check to insure that your battery is a real Samsung original battery. On the weekend I found a freind that had a cheep knockoff battery in her phone that she had purchased new from Best Buy. Her new phone had come new from the stor with a cheep knockoff battery.

My guess is a sales guy at the store did a swap because s/he wanted a new battery. This freind's phone has a cheep e-bay look-a-like. I only recognized it as a fake because I had bought some of the same brand off of ebay previously. The way to recognize this particular fake is that is sais Near Field Communication on it. A real Samsung battery will not say that.
Last edited by Titus_Andronicus; 20th June 2014 at 05:14 PM.
20th June 2014, 07:29 PM   |  #6  
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You're waking up your phone too often ?

53% of your schoolday battery goes for screen.

Try to:
- use auto-brightness
- set dim screen after 30 sec of inactivity
- check if your screen is not broken in any way (sometimes when it breaks it can short-circuit one back-led and that makes your screen consuming 5x times more juice)
- avoid looking every 5 minutes at your phone clock it really won't make you schoolday any shorter


Btw, my battery lasts 3-7 days, one year old. Average power consumed for screen is 25-30% in my case.
20th June 2014, 08:57 PM   |  #7  
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Quote:
Originally Posted by gravisrs

You're waking up your phone too often ?

53% of your schoolday battery goes for screen.

Try to:
- use auto-brightness
- set dim screen after 30 sec of inactivity
- check if your screen is not broken in any way (sometimes when it breaks it can short-circuit one back-led and that makes your screen consuming 5x times more juice)
- avoid looking every 5 minutes at your phone clock it really won't make you schoolday any shorter


Btw, my battery lasts 3-7 days, one year old. Average power consumed for screen is 25-30% in my case.

well my screen is cracked, its the way i got it for free.

the previous owner did not report any battery issues.

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21st June 2014, 08:21 PM   |  #8  
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Maybe any App in the Background is draining your battery.
Which Gouvernor have u set?
22nd June 2014, 10:59 PM   |  #9  
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Quote:
Originally Posted by Mr.cyrux

Maybe any App in the Background is draining your battery.
Which Gouvernor have u set?

I got it on the standard governor, not sure what it was, I just flashed another rom to try, and on Ressurection Rom it appears to be a little better, but still draining too fast


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23rd June 2014, 12:23 AM   |  #10  
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So if it drains battery while you locked it, a wakelock can be the thing that's causing this...


Battery on a aosp rom is nowhere near the one of stock samsung, so i use chameleon rom which is a sammy based rom with aosp apps and aokp rom control and to get the features on newer 4.4+ roms i use Xposed+Gravitybox


The battery drop is well known by me, and it is driving me insane!!!! The cause of this is that the Fuel Gauge chip is displaying the wrong voltages what leads to wrong numbers and to our eyes a battery drop, there is no permanent fix for this and i'm expiencing it also and soon i will swith to another phone cause i cant rely on my phone anymore...


This saidi guess you are dutch cause of your signature and as your username has a 99 are you born in 1999??


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