Sun Xtender PVX-840T Deep Cycle AGM Battery (group 31) Industry Leading Solar Application Battery. Sun Xtender batteries provide safe, reliable and long lasting power. Environmentally friendly, there is no exposed lead on Sun Xtender batteries and they are 100 percent recyclable. Sustainable, Clean, Renewable Energy Storage. The non-spillable construction prohibits any electrolyte leaking or spewing, allowing the battery to be used upright or on its end or side. The maintenance free AGM design means no water replenishment ever. Utilizing pure lead calcium grids, the plates are thicker than the industry standard for longer cycle life, increased reliability and power. The low impedance AGM design allows for excellent charge acceptance and there is no current limit required with controlled voltage charging. Sun Xtender Battery product line features proprietary PolyGuard® Microporous Polyethylene Separators, shielding the positive plates against shorting, shock or vibration. No other manufacturers offer this dual layer insulation protection feature. Sun Xtender Battery covers and containers are uniquely molded with high impact, reinforced copolymer polypropylene and are designed with thick end walls to prevent bulging. The copper alloy T Terminals are corrosion resistant and are supplied with silicon bronze bolts and washers. All Sun Xtender Batteries ship Hazmat Exempt. Voltage: 12 Volts Capacity: 89 Amp Hrs Length: 12.95" Width: 6.75" Height: 8.96" Weight: 62.00 Lbs / 28.2 Kgs Terminals: M8, Internally Threaded Studs. SAE Automotive Posts (Available as Seperate Kit or installed at Factory) 5 YEAR Warranty- 1 Year Free Replacement / 4 Year Pro-Rata INCLUDES FREE GROUND SHIPPING!