... 1 year warranty 4.Size:38mm*19mm*67mm 5.5-7 days after confirm order 7.4V 2200mAh li ion battery packRechargeable battery pack ... -chargeTemperature protectionSecondary protection Advantages:1, High energy density2, High working voltage for single battery cells3, Pollution-free4, ... , anti-overload3.Compose Type : Injection Technology to make battery more stable4.Certifications : CE,UL,FCC, RoHS,ISO90015 ...