Jim Dalrymple of The Loop received the following statement from Apple concerning iOS 5 battery life complaints:
“A small number of customers have reported lower than expected battery life on iOS 5 devices,” an Apple spokesperson told The Loop. “We have found a few bugs that are affecting battery life and we will release a software update to address those in a few weeks.”
If you're one of the few, the small, the bugged, TiPb has compiled a list of battery life tips that might help you fix or at least minimize the issue in the meantime.
Source: The Loop