... design portable power supply WITH 5000mAh polymer llithium-ion battery PETC-P11 Specifications 5000mah power bankCharge for iPad, ... features: 1. Built-in high-capacity li-ion polymer battery, 5000mah, to make sure 500 times above charging cycle ... safety protection design, including discharger overcharge, overload, short-circuit, lighting protection function 4. Intelligent hand control on-off switch ...