BSLBATT® Battery has over 18 years of experience in Lithium and safety. The LifePO4 chemistry used in our batteries is much safer than lead acid which produces harmful by products (lead and acid) that are hazardous materials. Our BMS (battery management system) will detect any problems with the performance of the battery and shut down any cells not functioning properly. The BMS will also protect the batteries from any over-charging or under charging of the batteries. FedEx and UPS have approved our product for air and ground shipping.