Samsung Galaxy S Series

[bbow]

So yesterday, I updated my Samsung Galaxy S2 to the Icecream Sandwich.
I charged it before I went to sleep to 100%, like usual, and I turned off all the apps and wifi etc, but this morning when I woke up, my battery was completely flat and the phone was off.
I charged it for about 2 hours to about 88% and I had to unplug it as I had to leave the house, and after that, it used about 15% in 2 hours and 40 minutes and the battery graph does not seem too steep or anything, which I guess is quite decent, but it doesn't explain my overnight battery drain.

Is this normal after the update? I have never really took notice of the rate of battery consumption hourly as I know it usually lasts me a day. It's not a big problem I guess, but I need the phone tomorrow, and I'm not sure if it will drain the battery again like last night.

Also, I have the battery widget that came with the phone, under the percentage, it says the time left, and I've noticed it to be continously changing, at first it was 52 minutes, then to 12 hours, and then to 1 day and 2 hours, and now it says 14 hours. Again, is this normal? I have never took notice of this change previously either.

I would appreciate some help,
Bo

[GoNz0]

you may need to do a full factory reset as upgrading without causes lots of issues.

[swarren]

@bbow

This can happen after the update, you need to do the following:-

1) Fully charge to 100%

2) Use normally, but fully discharge battery

3) Recharge again to 100%

4) Step 2 again.

It usually takes ICS 2 or 3 of these cycles to fully optimise the battery, you should then find it lasts longer than with Gingerbread.

Hope this helps

Steve

[fuchetj]

Are you using swype?

if so, check the battery usage of the apps and you will see swype very close to the top in the list. 

Force close it and change you input method. as swype is messed up since ICS update

[JSK73]

If you follow Steve's good advice you should find that your battery will optimise in a few full charge and discharge cycles and will offer a significant improvement over Gingerbread.