I have an iPhone 5S, purchased right when they were introduced in\nSeptember of 2013 (16 GB, iOS 8.1.2, on Verizin). While I had always\nthought it was using battery power a little faster than expected (and I\nhave an incident ticket for this with Apple-they said the battery was\nfine), for the last few days, it has been going through battery power\nvery rapidly. This morning, though the phone wasn't reallly used that\nmuch, the battery power went from 98% to 68% in about 3 hours.* Of\ncourse, I don't have AppleCare, so Apple is unlikely to do anything. I\ntry to keep as many apps closed as possible, and am very careful to\nclose any apps that use the GPS. I also keep the screen pretty dim. Is\nthere anything else I can do?\n\nThank you in advance.\n\n*By light usage, I mean that I spent about an hour listening to music\nthrough Bluetooth headphones, checked my email a couple of times and\nmade a couple of very short phone calls.