Built-in high-capacity li-ion polymer battery, 5200mah, to make sure 500 ... .Battery life: Charging-discharging cycle times≥500Feture:1. Built-in high-capacity li-ion polymer battery, 5200mah, to make sure 500 ... , Blackberry, Moto, Samsung, Sony Eriksson etc), digital products charging.3. High standard safety protection design, including discharger overcharge, overload, short-circuit, lighting ...