NPP Battery NPP is an international enterprise that specializes in R&D and manufacturing full range of renewable energy products such as SLA, AGM, deep cycle, gel, and lithium batteries. NPP currently own & operate 6 factories and 19 offices worldwide, 2 of the offices are based in Los Angeles CA and Dallas TX. Battery Specifications Nominal Voltage: 12 voltRated Capacity (20 hour rate): 55 ampDimension (L x W x H): 10.91'' x 8.7'' x 8.7''Approx. Weight: 35.3 lbsTerminal: T14Maximum Charging Current: 15AMaximum Discharge Current (5 sec.): 400ACharging Voltage: 14.8V - 15VFloat Charging Voltage: 13.8VDesigned Floating Life (68 Fahrenheit): 12 years 30% DOD: 1200+ cycles 50% DOD: 500 cycles 100% DOD: 200-230 cycles (NOT RECOMMENDED) Charging Guideline Ideal charging temperature: 68 degrees Fahrenheit. Avoid charging at temperatures above 122 degrees Fahrenheit.To achieve optimum performance and long lasting, never discharge battery over 50% of it's full capacity. Avoid discharge your battery more than 80% as this will greatly damage the battery's internal components.Always fully charge batteries after each use. Both under and over-charging can reduce the life of the battery.Never combine different brand, different age and different capacity batteries together. This will cause serious damage to the battery. Solar System Trolling Motor RV Golf Cart Wind Power Pallet Jack