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I updated my non-rooted Samsung Galaxy S2 from 2.3.5 to 4.0.3.

Now, I recognize a significant decrease in battery lifetime.

Any idea what may cause it and how to get around it?

Izzy
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Alexander Rühl
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    This question is extremely hard to answer without any details. At least look at the "Battery" stats in your settings screen and supply some stats on what's using the battery. – pzkpfw Aug 28 '12 at 07:30
  • I agree - my intention was to ask if this may be a common problem with that Android version or device. – Alexander Rühl Aug 28 '12 at 09:18
  • Concerning current battery consumption - I see 50% for the screen (allthough it's off for most of the time) and 25% for Android OS and no application with significant consumption. – Alexander Rühl Aug 28 '12 at 09:20
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    It's normal for the screen to use most of the battery, if the Android OS takes a lot even in standby you should probably try a factory reset/clean install. – pzkpfw Aug 29 '12 at 12:08
  • This could be caused by WakeLocks (see: How to deal with (orphaned) WakeLocks?). Please check at least your battery usage screen for the indicators described in that questions answer; if they match, follow the steps there (and let us know here). – Izzy Dec 22 '12 at 14:11
  • @Izzy: Ah thank you for the hint, but I did a clean install in the meantime and an update to 4.0.4. The battery consumption is back to normal (if one can call this normal that a phone sometimes doesn't even survive a day of usage...) – Alexander Rühl Dec 23 '12 at 21:59
  • @Geziefer Glad you solved the issue! Would you mind to present your solution by answering your own question? That way it's easier to see this Q is answered. As for the runtime: Well, it's no longer just a phone, it's rather a pocket computer which can handle phone calls as well. Would you complain if your laptop "dies" after 18h on battery? ;) Still, I hope they can increase the runtime to 7 days at least... Hope dies last. – Izzy Dec 23 '12 at 22:10
  • @Izzy: well, thing is, I wouldn't call it a solution, if one has to completely reset his phone to get an official update working correctly, that's why the question is not really answered even though I 'solved' it that way.As for the battery, I do know what this little thing is capable of doing, but isn't it a bit like driving a Porsche with a 10l fuel tank? – Alexander Rühl Jan 01 '13 at 20:18
  • I'd consider it better than to sit around and whine "my battery is empty". But OK, up to you. And sure, more powerful batteries wouldn't hurt XD – Izzy Jan 01 '13 at 21:09

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