Battery size is 4800mAh, so thats good for at least one chargeInput is 5V 1.5A, but output is 5V 1A, so really slow charging, essentially trickle charging. So one should start charging early in anticipation of heavy usage.Charging the phone case uses a lightning, which is as expected.Like all battery cases, it's on the heavy side, but that's a trade off of carrying a separate battery bank or having it integrated.See full review