After charging my iPhone in the case all night it shows the iPhone fully charged but the case is only charged to 44%. I would would have thought In approx 8 hours it would be closer to full. I have it charging through a USB port. Maybe this is the problem. So I will try switching to an iPad charger. This is the second smart case I've had because I exchanged the first one. It didn't seem to exhibit this problem until a few weeks after I owned it much like the current is doing now.