Originally Posted by hoban_eris
50% here on rooted 2.1 as well.
What's this battery airplane mode trick?
So i have found one solution thanks to a thread over at another site....
Seems as if there is some sort of bug with with Cell standby that causes the phone to lose signal which in turns just kills the battery. To verify that your set has the problem, check the Cell standby info in the Battery Use info. If the Time without a signal is higher than 0% (50% seems to be the norm) than you have a problem.
One solution, at the moment, is to follow these steps:
1. Plug in phone charger
2. Put phone in Airplane mode
3. Put phone to sleep for a minute
4. Turn off airplane mode
5. Unplug phone
I can confirm that this works and my Time without a signal is at 0% for over 9 hours now. The battery life is MUCH better and the phone didn't die on me last night while i was sleeping.