1. Are you ready for the Galaxy S20? Here is everything we know so far!

Battery advice please

Discussion in 'Android Devices' started by lavellep, Sep 1, 2011.

  1. lavellep

    lavellep Well-Known Member
    Thread Starter

    Hi all.
    Thanks for stopping by to read this.
    My question is regarding the battery on the s2. I know it has never been considered phenomenal but mine seems to be getting worse., not better.
    When I first got my handset only a month ago,, from a full charge., I could use it continuously for about 30-40 minutes before I'd drop from 100% now, I'm managing to go from 100% to 90% in about half an hour. My phone doesn't have anything else running in task manager., plus wifi is off and I have the brightness turned down. Am I being dense?


    1. Download the Forums for Android™ app!


  2. heshanj

    heshanj Android Expert

    installed any new apps recently? added a new widget? something that is always running in the background or updating every hour or so. these wouldnt show in ur task manager. check out settings/applications/running services.. and see if there's any unnecessary process running.
  3. steslatt

    steslatt Android Expert

    Take a look at your battery usage stats, Menu>Settings>About Phone>battery Usage. This will tell you whats using your battery the most.
    iftekharsir likes this.
  4. lavellep

    lavellep Well-Known Member
    Thread Starter

    Wow - that's great. Thanks for this. Turns out I have about 28 processes running.
    Some are widgets I downloaded but are not actually being used on the screen - will they still be hogging battery power?
    I'm tempted to run a new FW on it as I gather that they can help fix battery life but I don't really know what I'm doing. I don't want to lose any functionality and despite reading the tutorials, I may as well be reading mandarin for all the sense it makes to me. I am fairly tech savvy and was a jail breaker on the iPhone but I just don't seem to be able to get my head around it on Android.
  5. heshanj

    heshanj Android Expert

    widgets not being used on the homescreen should not drain battery, nor should they show up in ur running processes list.. however, just note any new app/widgets that u installed.. and check if theyre using a lot of battery, using the battery usage as steslatt said.
    upgrading firmware is very easy, u just need to get started once and u'll realize :D its not rooting, u dont have to root to flash new firmware.. go here:
    [ROM + Guide]Official i9100 Firmwares KF1/2/3/4/, KG1/2/3/5/6/7, KH1/3 Download - xda-developers

    flash XXKG5 if u wanna stick to official firmware, or XXKH3 if u dont mind trying out a leaked firmware.. both are great on battery, and nothing will be changed on ur phone..

    rooting can also help save battery life, by freezing unused system apps that drain battery.. u can also control which apps auto start, etc etc.. these methods too have really helped me extend my battery life.. the best and easiest rooting method is the CF root method.. here's the guide

    [17.08.2011][CF-Root v4.1] KE2/7/8, KF1/2/3/4, KG1/2/3/5/6/7, KH1/3 - su+bb+CWM4 - xda-developers

    hope this helps :)
  6. lavellep

    lavellep Well-Known Member
    Thread Starter

    Wow, Heshanj. Thanks so much for taking the time to write all that. I'm going to read it all now.

    Just a few quick questions:

    * If i upgrade fw, is it like doing an update on an iPhone or like a factory reset? i.e.. will I lose everything and the configurations I have?

    * Can it be undone? ie. How would I obtain and ref lash with the original FW if it didn't work out?

    * Are there any things that are lost in doing this to the phone? Any bits of the OS or functions no longer available?

    * Can it be done via a mac?

    Thanks again.

  7. steslatt

    steslatt Android Expert

    You dont lose any data when updating firmware.
    It can be undone by flashing your original firmware (download a copy first)
    Yes sometimes some functions are lost like text message skins are no longer present in the newer firmwares.
  8. greggebhardt

    greggebhardt Android Enthusiast

    You are likely using more power because of an application that is polling the server for data. This could be a weather or social networking software. If the battery is all of a sudden being consumed quicker, there has to be a reason.
  9. lavellep

    lavellep Well-Known Member
    Thread Starter

    I've rooted. Pleased to say that it wasn't as painful as I expected. but bricking it about replacing the fw as haven't a clue which to pick for my needs (better battery) and xda-developers is sooooo hard to understand if you're a newbie.
    Thanks fo ryour help!!
  10. heshanj

    heshanj Android Expert

    ur welcome :) steslatt has already answerd those questions. i hope take the plunge n flash an update (even without rooting) the only thing i can think of thats missing is the messaging app themes.. apart from that, its pretty much all benefits (the biggest one being battry life almost doubling, in my case)
  11. Antakar

    Antakar Member

    Where can i find original firmware for download?
  12. steslatt

    steslatt Android Expert

    For carrier branded firmware see here

    For unbranded firmware see my sig.
  13. Puccagirl

    Puccagirl Newbie

    I found when I had similar issues.. I rebooted the phone... and that fixed the weird fast draining of the battery (when nothing seems to be running).
  14. evohicks

    evohicks Android Expert

    Not sure if its gonna make any difference but...
    I followed one of the latest posts in tips & tricks sticky on this forum, started the phone in safe mode and it sorted my phone out as regards to memory usage etc, my phone seemed to be alot more responsive after rebooting, maybe nothing but try it, it maybe because there are less things running in the background and using more power.
  15. iftekharsir

    iftekharsir Lurker

    thanks on battery usage
  16. DeAtomizer

    DeAtomizer Lurker

    how do you start the phone in safe mode?

Samsung Galaxy S2 Forum

The Samsung Galaxy S2 release date was April 2011. Features and Specs include a 4.3" inch screen, 8MP camera, 1GB RAM, Exynos 4210 Dual processor, and 1650mAh battery.

April 2011
Release Date

Share This Page