BTY Mobile "10400mAh" Power Bank for IPHONE / Samsung / HTC - Black
Press the switch button to display the capacity: 4-LED on (76~100%) 3-LED on (51~75%) 2-LED (26~50%) 1-LED on (please charge for the power bank in time); USB output interface: Charging for all 5V digital products cell phone IPAD / IPHONE.