aa lithium battery 1. Voltage: 3.7V, Capacity: 750mah 2. Capacity: UL, CE, ROHS Certified 3. 12 months warranty aa lithium battery1. Voltage: 3.7V, Capacity: 750mah2. UL, CE, ROHS Certified3. 12 months warranty Country of Origin: ChinaNo memory effectEnvironmental friendly