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Lithium battery features: 1.Life expectancy is two times that of lead-acid batteries.The weight is more lighter 2.No memory effect and rechargeable.the battery life is more longer 3.Safer and more environmentally friendly, No heavy metals and hazardous substances. 4.Built-in IC chip will prevent battery pack over charge, over discharge, over-current, over-heat, short circuit .  5.Avoiding mechanical accidents caused by vibration.  Electric Bike Battery Specifications: Battery Model: Silver Fish battery Normal Voltage: 36V 48V 52V                                                                                                     Rated Capacity:20ah 30ah 40ah 50ah 60ah Battery size:390*80*110mm Max Constant Discharge Current:25A Peak current:60A Charge voltage:54.6V Discharge cut off voltage:36.4V Way of Charge:CC/CV Cycle Life:1000 times Charge Temperature:-15-65℃ Discharge Temperature:-15-65℃ Protection Function:Over charge, Over discharge,Over current, Short circuit,Balance