Sorry for new thread. My iPhone 5 keeps losing around 8% chunks of battery life at various points. 28% to 21%, 18% to 10%, 37% to 30% etc. My phone is 14 months old. Is anyone else getting this? It worked fine on iOS 6. Does 7.1 make a difference? I can't keep going to the Apple store as it's so far away and really inconvenient. Any ideas?? So frustrated.