... life 3.Electricity-save function 4.LED indicator light 5.high quality of Li polymer battery core 6.double circuit to ... in designing producing & sales all types of switching power supply and batteries: Portable power bank charger, Desktop chargers, travel charger, car charger, ... 2000 international quality system, and CE,GS,CB,BS,SAA,CCC and TUV and so on. 5200mAh external power bank portable battery ...