... in boat, medical equipment, alarm system, emergency lighting system, UPS and energy storage. 1. Large capacity available, 99% of ... 60% for lead-acid battery).2. Green and environmental, no containing acid and heavy metal such as lead, cadmium and ... weight, only 1/3 of the lead-acid battery, no need to add water, avoid maintenance completely.9. Safe ... and over discharge. 12V Li polymer battery for UPS