... . Our company was established in January, 2006,and specializes in mass production of big electric current batteries, such as 4AH~50AH,3 ... .4VLess-voltage Protect21VWeight2.6Kg SizeW×L×H97×146×205mm User:Electric bicycte and Electri-Motocycle etc. How to use the battery correctly ... :Battery is the power source of electric bicycle,and it is a kind of consumption goods.The price ...