First-class lithium-ion battery Edison power bank 20000mAh increases the duration of your smartphone, tablet or digital camera battery work. ipower bank 20000mAh is capable to charge the Mi4 smartphone 4.5 times, iPhone 6 as much as 7 times, and the new Macbook — 1.2 times — that’s impressive! The powerbank has a rectangular shape with rounded edges, on its upper face there are two USB ports, a micro USB and four LEDs indicating the batter.Battery type: lithium-ion polymer battery
Battery energy: 37Wh 3.7V/20000mah
Rated capacity: 37Wh/3.7V
Input interface: Micro-2.0A
Output interface: 5V=2.1A
Charging time: about four hours  about six hours (5V/2.1A charger)