ABD4800 is a rechargeable protected 4800mAH battery, which is compatible with the most flashlights and other electronic powered by 21700 Li-ion battery,Utilized 1 x 4800mAH battery cell, and its time of charge can reach about 500 times. It enjoys a long battery life. And it would provide enough power support for A21 and TO50R flashlight.1. Utilized 1 x 4800mAh battery cell2. time of charge can reach about 500 times3. Comptible with A21 and TO50RSpecification:1. Specification: 217002. Capacity: 4800mAh3. Voltage: 3.7V4. Max current: 20A5. Weight: about 80g6. Times of charge: 5007. Recommended usage temperature: -10~60