my i3gs normally can last around 1-2 days. I play it quite heavily and charge everynight through usb port.

Anyway, after turning on push feature due to playing some online game, mafia wars, vampire live, kingdoms and so on, I turned on the push notifications without knowing the adverse effects. True enough, the battery drain started. The phone's power went totally drained and was hot even without turning it in off mode.

100% to 20% only lasted around few hours.

After doing some reading, I have turned off location finder and push. Hope that batt life will go back to normal.