Possibly, its part of a bedside clock. However, the 5S is fine and works perfectly when plugged in and on iOS9.3.5. Its been in use for months. Anyway, all downgraded now (not the 6S, I'm still mizzling about that) but the 5S and ipad Air2 are back to 9.3.5 and no regrets.
The6S on iOS10 works fine when plugged into the same outlet. shrug