... Lithium Battery 1. 18650 li ion Battery, 3.7V, 2200mAh 2. Environment friendly, well quality 3. 1 year warranty 4. CE ... at -20 to +45 degree centigrade Humidity: 65+/- 20% RH 2, Environmental and SafetyThe cell is approved according UL 1642, CE ... battery 18650 Lithium Ion Battery, 3.7V, 2200mAh, 500 Times Cycle Life