iOS is great and I like the animation when closing the apps. But it drained my iPhone battery like a leaking oil tank. Before I upgrade to iOS 7, I only need to charge my iPhone every alternate day. After upgrade to iOS 7, it seems like I just installed a “vampire” app in my iPhone. Within three hours, I noticed that my iPhone lost 30% of its battery power.
Firstly, I made sure most of the background apps are closed and I blocked my GPS tracking. But it did not help a lot. After some experiments, I finally found out the culprit and put in the effective fix. The culprit is “iCloud”. Once I turned off all my iCloud sync in Setting->iCloud, now my iPhone battery is back to its normal self.
Hope this tip will help others that are facing same battery life problem.
iphonehowto123 