... the capacity available (50%--60% for lead-acid battery).2. Green and environmental, no containing acid and ... specific capacity, with higher capacity than lead- acid battery with same size.4. High cell discharge platform, ... cycle life, 4-5times of the lead-acid battery.6. Low self-discharge rate, only 1/20 ... weight, only 1/3 of the lead-acid battery, no need to add water, avoid maintenance completely ...