April 10th 2014
By Mike Flaminio
Scotty Loveless is a former Apple store genius who offers "The Ultimate Guide to Solving iOS Battery Drain." It's a good read for diagnosing and troubleshooting the iOS battery usage.
So here's the test: write down your usage and standby time, press the sleep/wake button (or lock button, as some call it) to put the device to sleep, and set the device down for five minutes. When you come back, take note of the change in time. If your device is sleeping properly, then the Standby time should have increased by five minutes and your Usage time by <1 minute . If your Usage time rises by more than one minute, you have a drain problem. Something is keeping your device from sleeping properly, significantly shortening the time it will last.