With a 4,000 mAh Grade A Li-Ion battery and a 5V/1A Output the UL Certified Erg Power Bank is a great power supply for your smartphone.
LED indicator lights show you how much power is left in the battery backup.
Includes a USB to Micro USB connecting cable which can recharge the battery backup or be used to charge up devices with a Micro USB input like Android Smartphones from Samsung, Motorola, HTC, Nokia, and others. This product has passed UL standards.