Tendak 6000mAh Power Bank Dual USB (5V/2.1A and 5V/1A) External Battery USB Charger for iPhone 6 Plus 6 5S 5C 5 4S 4, Galaxy S5 S4, Galaxy Tab, LG G3, Nexus, HTC One M8, MOTO X - Black HIGH CAPACITY - Large 6000 mAh high quality low self discharge Li-ion battery DUAL CHARGE - 5V-2.1A and 5V-1A USB outputs works simultaneously for 2 devices. Recharge smartphones, tablets, mp3 players, digital cameras and more Auto power on/off. When disconnecting the device, auto power off after 15 seconds, no need to press any buttons Conversion: 85% - 90%, charge iphone 6 about 2 times With design patents, 4 LED light shows the battery level: 100%, 75%, 50%, 25%