VMAX (XTR34-75) 12VOLTS 75AH DEEP CYCLE, XTREME AGM BATTERY. Nominal Voltage: 12V 20Hr Capacity: 75AH RC (min): 145 HCA: 1100A Terminal Posts: 6mm (included) Charging Current*: 5A-20A Charging Voltage: 14.4-14.9V Weight: 45lb Dimensions: 10.2"w x 6.6"d x 7"h(7.2"th**) RECOMMENDED CHARGING OPTIONS: AC Chargers: Any Quality Brand AGM- Smart & Microprocessor controlled- charger with the recommended specs above can be used. Battery Charger Guide. Vehicle Alternator: 14V-15V. RV Converter: 14V-15V. Solar Panel: 135W-350W. Wind Turbine: 135W-350W. Charge Controller: 15A-UP. ***Warning: Do not use a charger with smaller amperage than the recommended Charging Current shown above. Maintainers should ONLY be used to maintain a fully charged battery but NEVER as a charger. **Total Height including terminal post. OPERATING TEMPERATURE RANGE: Discharge: -4~140F Charge: 14~140F Storage: -4~140F TEMPERATURE COMPENSATION: Cycle use: -30mV/C Standby use: -20mV/C