Originally posted by .Coqui
Yes it help battery life but it most for the 4S because that 4S have problems with the iOS and the life battery which is supposed to be fixed in 5.0.2 or 5.1
I actually have no problems on my iPhone 4S in regards to battery life on 5.0 it lasts the whole day with about 500-1000 txt messages goin out a day, surfing the web on and off, and playing games.. The trick is to turn brightness very low and location settings off besides for siri and maps..