I have an iPhone 6s. I updated to iOS 10 and I have the following issue... it may not be linked to iOS 10 and may just be coincidence that this started happening the next week. If the remaining battery on my phone is lower (not even low enough to kick in low power mode -- looks to be < 35%), and I power off my phone and turn my phone back on, it thinks my battery is dead, and when I turn my phone back on, it powers off after a few seconds. During those few seconds my phone is on, the battery is reported as being around 30% still. This only occurs if I turn my phone off for any reason. If I never turn my phone off, I can run the battery all the way down to <1% before the phone shuts off. If I plug my phone into a charger for few seconds, no issues and the phone resumes normal use. I've tried doing hard resets too, immediately after turning the phone on and just in general to see if that helps, but no dice. Any ideas? I just updated to 10.0.2, but I don't think I saw anything in there related to this in the release notes. Thanks for an insight anyone may be able to provide.