iPhone battery life problems in iOS 7? Don't worry. We've got brilliant battery-saving tricks and tips that will help you keep the iPhone's battery running all day long. Here's how to improve your iPhone's battery life in iOS 7. Updated 11th October 2013 Since iOS 7 was launched, many iPhone users have reported that battery life has got worse. In some cases this may be an illusion - we've read one site pointing out that you may have simply used your phone more frequently since updating to iOS 7 because of the interesting new features, which would obviously make it less likely to survive the day without needing a top-up. But there are legitimate issues with battery life in iOS 7, and steps you can take to improve matters.