Pep 4000 mAh power bank. 4000 mAh slim, lightweight aluminium power bank with grade A lithium polymer battery. The LED indicator lights up during charging and displays the remaining battery capacity in the power bank. Power bank’s input is 5V/1A and output is 5V/1A. Includes a USB to Micro-USB charging cable. Supplied in a blank white gift box. Aluminium. 3.