Coolnut 20000mAh Power Bank with 4 Digital LED Indicators. With high-speed charging technology, this amazing power bank rapidly charges your smart phone and other high-tech gadgets with a maximum of 2.1A output. It quickly puts life back into all your devices, whether indoors or outdoors. Made with the best premium quality ABS+PC material with elegant and brilliant looks, it shell case offers great strength for long. Its unique feature that enhances its class is the beautiful looking Digital LED display to show remaining charge level.Compared to other cheap quality models that fail to serve high-output charge, this innovative and integrated power bank comes with Original Li-ion cells that serve very powerful charge. Moreover, to completely safeguard your charging devices, the power bank is incorporated with IC protection and 7 layer multilevel charging-discharging mechanism