Apple ships different capacity chargers with different devices. There are high powered chargers shipped with iPads and low powered chargers with phones (and maybe iPad Mini's). I bet if you look closely at the charger that came with your device it says it is a 2.4 amp output and if you look at a phone charger it says 1 amp. Your computer is probably less than 1 amp. I've run into lots of trouble charging iPads in tractors while trying to run grain cart scales. The screen is always on and bluetooth active. The iPad will only stay charged if I use a 2.4 amp charger. |