Is it alright to charge iPhone while its off?
It usually takes approximately 2hours to charge my battery drained iPhone(4s). I'm wondering if I shut it down while charging would lessen the number of hours of charging. My concern is, if ever its system have a software/hardware that would prevent it from overcharging, still work while its off.
Same question goes to other iPhone models and all iPod and iPad generations.
iPhone 4S, iOS 6.0.1