... etc4. Over charge and discharge protectSpecifications:*Internal battery type: 3.7V Lithium battery*Capacity: 6800mAh*Input: 5V-500mAh*Output: ... year Detailed features: 1. Built in-high-capacity Li-ion polymer battery, 5000mAh, to make sure 500 times above charging ... Moto, Samsung, Sony Eriksson etc), digital products charging 3. High standard safety protection design, including discharger, overload, ...