Hey guys, Like many of you here, I've been having battery issues and overheating (at times) on my iPhone 4 with iOS 4.3.1 (jailbroken). A day before when I slept and woke up (after 8hrs), I saw there was about 13-14% dip in battery in sleep mode. So, I looked up google for some tips to save battery so I came across this: iOS 4 does save things on the backdrop, i.e, applications which you have used keep running on the backdrop. Tap up the home button twice on the home screen and you'll see a new set of icons, these applications have been running on the backdrop. Close these, you can do this the same way you move icons on the home screen. I have some games which are heavy on graphics (like FIFA 11, Angry Birds, Fruit Ninja etc.) which were running on the backdrop, I closed them. Now, when I woke up today (after 6hrs) there was only 3% drop in battery (with alarm and wifi on). So, I'm guessing this might be a solution to the battery problems with iOS 4. If you guys have any other solutions/tips to the battery problems then please post here. Cheers.