Best 24V/36V/48V 10Ah ebike battery LiFePO4 EV rechargeable battery Long life 1000 times CE,RoHS,SGS certificate OEM/ODM Lithium Iron ... , the batteries are approximately 1.3kgs (24V) and 2.0kgs (36V) in weight, 1/6 & 1/7 of the weight of ... specific energy: soft packing with aluminum foil composite film on lithium-ion polymer battery, smaller , lighter,,higher specific energy than other ...