Battery pack weight: 7.5kg. Battery capacity: 15AH ± 2%.Charging cut-off voltage: 58.4V. Discharge cut-off voltage:33.6V. At 23 ± 2 , 0.5C constant current. Instantaneous maximum discharge current: 45A. These charges are the buyers responsibility. While we will declare lower price and mark as a sample. We are a professional R & D, sales, production of batteries and electric bicycle modified company, We are located in Shenzhen, China. In addition to existing products, we can also customize a variety of batteries according to customer needs. Our batteries have been applied to electric bicycles, solar lights, robots, medical instrument and other energy storage instrument. If you have any problems, we are willing to help you. We will do our best to resolve your problems asap. The item "MTB 48V15AH LiFePO4 Batteries BMS Charger Rechargeable Solar Energe Powerful UPS" is in sale since Monday, August 28, 2017. This item is in the category "Consumer Electronics\Multipurpose Batteries & Power\Rechargeable Batteries".life" and is located in Los Angeles. This item can be shipped worldwide.