iOS 7 update completely revolutionizes the overall user experience and the iOS operating system as well. iOS 7 also brings a ton of new features to the table such as dynamic wallpapers,parallax effect and a nice GUI refresh. But, all of this comes at a hefty expense, the incessant drain of your device's battery life. After using iOS 7 for some days on iPhone 5, here's a nice detailed guide i prepared for you all. so hit the jump and improve battery life on your iPhone, iPad or iPod touch.