Mine was showing a big decrease in battery 2 days ago after playing pocket god. It was fully drained over the nite. From then on the battery percentage goes up and down like a rocket say for instance from 45% straight to 35%. I wanted to restore using itunes but there is a need to upgrade it to 3.1.2 version. I am currently in 3.01 JB and i dont wan to upgrade fearing that i cant JB it again and also that my baseband will be upgraded as well. I tried push off, 3g off, blutooth off, edge off, all processes off in sbsettings, brightness 40%. Did a reset as well. Now batttery still charrges and used up like a rocket....ie going up and down fast!!