... 5v 5000mah rechargeable external battery charger mobile phone1. Built-in high-capacity polymer battery, 3200mah, to make sure 500 ... times above charging cycle. 2. High standard safety protection design, including discharger overcharge, overload, short-circuit, lightning protection function. ... your phones etc. 4. Press the switch 3 seconds, which means that LED lit up and mobile power can work. 5 ...