1. 3.7V 2. Full capacity 3. Dual IC 4.ISO9001,CE,ROHS certification 5. Cycle Life: 500times Basic information1. 3.7V/7.4V/11.1V/14.8V2. Full capacity3. Dual IC4.ISO9001,CE,ROHS certification5. Cycle Life: 500timesAt present, we could make the lithium battery from 180mah to 20000mah. lithium polymer battery 3.7v 3500mah