For the last couple of days my iPhone 6s has been shutting off at fairly high percentages (14% yesterday, 18% today). When I try to turn it back on, sometimes it will give me the low battery symbol, but other times it will turn back on. However, even if it does, it shuts off again very quickly. Even before this started happening, I suspected something might be wrong with the battery because I would only average about 6 hours of battery life with normal usage, while a lot of people on this forum seem to be getting 7-8 hours. Additionally, I've had some weird problems with charging. Sometimes my phone would seem to be charging very slowly, so I would reset the phone and when it turned back on, it would be at a higher percentage than before (around 10% more). There doesn't seem to be any major problem with the discharging rate though. Just a bit of background in case it might be relevant: When I first got my 6s, I restored from a backup of my old iPhone, but was encountering a bug with Siri so I restored as new. Even with this restore, like I mentioned before, my battery life has been somewhat suspect. Do you guys think that I have a problem with the battery, or should I just restore as new again? I'm somewhat reluctant because I have some saved game data that I don't want to lose, but if this is just a firmware glitch, I'll have to do it.