... of the capacity available (50%--60% for lead-acid battery).2. Green and environmental, no containing acid and ... capacity, with higher capacity than lead- acid battery with same size.4. High cell discharge platform, the discharge ... 12.8V.5. Long cycle life, 4-5times of the lead-acid battery.6. Low self-discharge rate, ... -circuit, over charge and over discharge. 12V 4.5Ah Lithium polymer UPS battery