I've noticed battery "issues" along with other issues since 7.0.3. Of note, it dropped from 100% down to 50% in a matter of about 2 hours with nothing other than wifi on checking mail. No maps, no background apps, just mail.
IT dropped from 50% down to 40% in a matter of 10 minutes. I rebooted the phone and switched over to the iPad (Woz style multi tasking and redundancy).
The phone dropped from 40% down to 7% in the matter of an hour after that. Instead of charging it, I decided to let it keep going. Shortly after, it was at 1%.
The phone stayed at 1% battery life with cellular and wifi on, still just checking mail.... for 5 more hours before shutting off.
So.... I think it's a battery calibration issue and the battery might not actually be as low as it is reporting. I'll keep testing, but I'd recommend trying to let it keep running till it shuts off, then charge it completely.
IT dropped from 50% down to 40% in a matter of 10 minutes. I rebooted the phone and switched over to the iPad (Woz style multi tasking and redundancy).
The phone dropped from 40% down to 7% in the matter of an hour after that. Instead of charging it, I decided to let it keep going. Shortly after, it was at 1%.
The phone stayed at 1% battery life with cellular and wifi on, still just checking mail.... for 5 more hours before shutting off.
So.... I think it's a battery calibration issue and the battery might not actually be as low as it is reporting. I'll keep testing, but I'd recommend trying to let it keep running till it shuts off, then charge it completely.