Battery drain - source found

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I have had problems with battery drain on my S2 from the day I bought it. The battery would last apprx 12-14 hours before going dead - almost without use.

I then removed an Exchange (ActiveSync) mail account. And the problem was gone. 30+ hours battery with no problems. I added the mail account back, and the problem reoccured. I testet this some more times and it was consistent each time. BTW I was not using push, just manual mail update.

The mail account that I am adding forces encryption on the phone, so it might be that this is the actual source of the battery drain. But it shows that the phone is useless using ActiveSync with encryption.

I was hoping that this was fixed in 2.3.4, but the problem was the same there as well. Until this is fixed (which I don't suspect will happen) I can not use the phone with my job email account because of this.

Yes you can go to themes and apps section and search for the administration removed email app, stock app with the corporate control removed try it and see if that works better, currently using it myself and no big battery drains.

Sent from my GT-I9100 using XDA App

"go to themes and apps section and search for the administration removed email app, stock app with the corporate control removed"

Where is this? Android Market? I did not find it...

Themes and apps section of this s2 forum

Using 'Push' uses a lot of battery. See if you can manage with 'Manual' or scheduled to check every few minutes.

Also disable 'Auto-sync' if not required.

Log out of Latitude from within Maps.

Originally Posted by anisbombaywala

Using 'Push' uses a lot of battery. See if you can manage with 'Manual' or scheduled to check every few minutes.

Also disable 'Auto-sync' if not required.

Log out of Latitude from within Maps.

As I said in my initial post - I do not use push - I have everything on manual. It drains battery even if I do not check the mail once.

jr866gooner: I found it, but I guess this forces rooting of the phone? It is a phone owned by my employeer, so this is unfortunately not an option :(

Originally Posted by steinrr

jr866gooner: I found it, but I guess this forces rooting of the phone? It is a phone owned by my employeer, so this is unfortunately not an option :(

You can unroot upon return just use a insecure kernel which will bypass superuser I think.

Sent from my GT-I9100 using XDA App

I also pinned down my huge battery drain (10% per hour) to the Exchange email connection I use. I have tried various stock ROMs and some custom ones, but all seem to give the same result. I must say that older ROMs did not seem to have the drain this much. I am currently running Cognition 1.5.1.

Currently I work around the drain by manually syncing my email whenever I want to read email and this results in a whole lot less battery consumption (I now have 50-70% battery left with moderate use, instead of only barely managing 8 hours or so.

I have installed the modified Email.apk to see if this fixes some issues. The email.apk in Cognition did not have a .odex file anymore and was a few bytes different in size, so I really really hope that this fixes the drain. I'll keep you posted.

Gerco

Would someone please be so kind to link the thread with the modified apk? Forum search through tapatalk is not always an easy task
Thanks a lot guys

Inviato dal mio GT-I9100