... CE,RoHS,SGS certificate OEM/ODM Rechargeable Electric Bicycle Battery 36V 10Ah LiFePO4 E-bike Battery and Battery PackSpecifications: Nominal Voltage36VNominal ... are approximately 1.3kgs (24V) and 2.0kgs (36V) in weight, 1/6 & 1/7 of the weight of traditional li-ion ... formula has superior tolerance on character of charge and discharge.6.Completely battery certificates ISO9001,ISO14001,BATSO ,CE,UL,ROHS, ...