Brought in my IPhone 5 for a warranty exchange due to the rear facing camera sticking. Easy experience, great service. The only interesting thing that came up was as my old phone was hooked up for diagnostics the young lady showed me a colored square chart and explained to me that my battery was in the "worn" zone which was indicative of overcharging on my part. She said to only charge the phone at 10 or 5 percent battery power to prevent it from happening again, because any warranty exchange would become a paid exchange if it the "worn battery" was detected. I have had significant battery issues since the last update, and restored several times in hopes of addressing the problem. Didn't help, and I have been charging more due to that. I did share that info with the young lady at the the Genius Bar. She didn't really comment and the exchange went off without any problems. I left satisfied and forewarned about overcharging. With six kids with iPhones and iEverthing else I've done a few exchanges over the years and never run into this new way of assessing batteries. I'm curious as to whether anyone else has encountered this "worn battery" scenario at an Apple store, and if so what was the outcome?