After upgrade to IOS 10, my iPhone 6 crashes with no battery even though it has over 70%. The screen goes blank and when trying to turn on it says no battery. Connect to battery charger it says 78% available.
Iphone 6 battery failed after upgrade to IOS 10
As iOS 10 is now public, user-centric queries/comments such as this are perhaps best put to Apple's public community support forums, where Apple tends to monitor user comments, and/or Apple's twitter support account, vs. risking off-topic here in the dev forums, thanks and good luck. Users can feedback via http://www.apple.com/feedback/ - Devs using betas are free to use the 'Report Bugs' link, below right.