Battery on Samsung Galaxy S2 on ICS likes to drop after reboot. Actually it happened when I was on Gingerbread as well. Anyone can help me fix this? Screenshots:
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There is no easy way in finding which process consumes your battery. The battery monitoring tool in Android is not active during boot, so anyone wanting to know what's happening will have to make deep hackings in the Linux kernel and Android init scripts. I don't even believe you have a rooted phone or have a Android AOSP sources snapshot somewhere to hack into.
Also I believe that the battery estimation mechanism is somehow fooled at startup. Because it has no previous data to compare to (N is estimated depending on the value of N-1). So the level you see right after bootup is probably wrong. That's why you see the level strangely increasing although no power source was connected in the meantime. To what extent is this level wrong? Question without answer I think.
I have an easy solution though: stop installing apps that make your Android crash or need (stupid) reboot :-)