Check the listing for details. VMAX800S Solar Wind Alt Energy AGM Deep Cycle High Performance Sealed Battery. Condition: New. Listed at 89.99 USD. SOLAR 28AH, 12V BATTERY VMAXTANKS V28-800S6.5" * 6.9" * 5"H TOUGH TANKS FOR TOUGH APPLICATIONS V28-800S Nominal Voltage20Hr CapacityRC (min) CCAMCA Terminal Posts DimensionsWeightCharging Current*Charging VoltageFloat Voltage 12V28AH502403006mm (included)6.5"w x 6.9"d x 5"h22lb2A-10A14.4-14.9V13.5V-13.8VRecommended 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: 35W-120W.Wind Turbine: 35W-120W.Charge Controller: 5A-30A.* 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.Operating Temperature Range:Discharge: -4~140FCharge: 14~140FStorage: -4~140FTemperature Compensation:Cycle use: -30mV/CStandby use: -20mV/CAGM Electrolyte Suspension System Custom Built Military Grade Alloys Maintenance free Operation Fast Charge Delivery Capabilities Extremely Low Self Discharge Rate Extreme Vibrations, Heat and Weather resistant Sealed Non-Spillable Non Hazardous Construction Maximum Power Density and Deep Cycle Capabilities Don’t settle for an average Lead Acid Battery, Choose a VMAX CHARGE TANK TERMINAL POSTS: Philips / HEX Screws for use with RING or SPADE terminal cable ends