... 1.CE,RoHs,ISO9001-2008. 2.18650 cells 3.1 year warranty ... 7 days after confirm order 7.4V 2200mAh li ion battery packRechargeable battery pack specification Model No.TLH- ... High energy density2, High working voltage for single battery cells3, Pollution-free4, Long cycle life5, No ... , anti-overload3.Compose Type : Injection Technology to make battery more stable4.Certifications : CE,UL,FCC, RoHS,ISO90015 ...