iPhone 4 - battery life has taken a sudden dive - any ideas why?
Hi - I've got an iPhone 4, which was new in September last year and up to now i've been getting 2+ days out of the battery, 3 if i'm lucky. In the last week the battery life has dived to about a day (unplug from charger at about 8am when i leave the house, and it is down to about 20% by 11pm when i have to plug it in to charge again).
I'm not aware of any updates taking place to the OS (although individual app updates have happened) and as far as i'm aware, i'm using it in exactly the same way as before. I've checked and bluetooth is off, as are automatic time-zone updates, both of which I know can cane the battery life.
Does anyone have any thoughts on what might be the cause of such a sudden dive in performance? Or any other suggestions for conserving battery, other than turning off wi-fi or 3g!