... mainstay, to assure no acid leakage of battery. l By using international standard of electrodes of elemental lead oxide adsorbing technology, the ... free l Adopting high lead-calcium-tin alloy and advanced production control technology, battery with low self discharge rate, and battery cycle life can ... l Can be charged by float voltage / open circuit voltag Rechargeable Lead Acid Battery 12V7.7AH 2260G