Characteristic: 1). Using super pure lead-calcium plate to make it dry charged with technology. After adding acid, place it under normal temperature for 5 minutes, then the battery can word without recharging. 2). Case is made of imported polypropylene plastic with japan injection technology. 3). This kind of dry charged battery can be deposited for one year or so, which overcome the disadvantage of battery with acid. 4). Adopting international iec standard sealing technology to make it super sealed, no worrying about acid coming out. Low price with high quality. Welcome to inquiry!