theebikemotor 48V9Ah-12AH Li-on E-Bike Battery Pack for Electric Bicycle, Made of Samsung Battery Cell Made of Samsung Battery Cell(Samsung ICR18650 22P & 29E), The battery life is much longer than the normal Li-on battery Can charge and discharge over 1500 times. 2A charger comes with! Down Tube Style, Integrated USB charging port. Can charge your phone while you ride! LED Lit On/Off Button and Locking Key. No import tax for the batteries to USA(not including Alaska, Hawaii, APO/FPO, US Protectorates) Motor work with: 12AH battery work with 1000W motor or below. It cannot work with the motor which is more than 1000W. And 9Ah battery can only work with 500W motor or below.