iOS 10.1 Battery drain
Hello.
Updated my iPhone 5 to iOS10.1 and have been having battery problems.
1 - It jumps from 30% charge to 1% in a few seconds then shuts down.
Now here is the stranger part.
As soon as it reboots after connecting to a charger it show 30% charge. When I unplug it right away it still shows 30% and runs like nothing happened for a good few hours.
So it goes from zero charge to 30% in the time it takes to reboot? Strange.
2 - Shutting the phone down at night with a good 80% charge, it won't reboot in the morning due to no battery charge. I plug it in and its back to 30% in a few seconds.
Thanks for any suggestion in advance.
iPhone 5, iOS 10.1