liitokala 21700 battery 36v 30ah 25ah 20ah 15ah battery pack 500w high power battery 42v ebike electric bicycle bms

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.