... than 25 km / h. The body structure,which can withstand 200,000 times of vibrations, shock device and the drive system ... of “LONGYEAH” eletric bicycle.Adopting safe and reliable lithium iron battery,which has fundamentally different with other lithium batteries, and much ... conditions, it will not explode or burn.The lithium iron battery is absolute enviromental friendly,and will not cause any pollution ...