Newlink powerpack USB high capacity 4000mAh Lithium-Ion battery cell Charges via a Micro USB socket at a rate of 1a (A full charge will take about 5 hours) 4 LED Indicator to indicate current power status LED flashlight Integrated current/voltage and short circuit protection Specification for Newlink Powerpack USB Mobile Device Charger Charging Over voltage Protection Discharge under-voltage protection Output Current Protection Short Circuit Protection Battery cell Specification : 3.7V / 4000mAh (14.8Wh) Input: 5v 1A Output1: 5v 1A Compact size 90 x 44 x 22mm (113g) Package Contents 1x 4000mAh USB Power Bank