Three 12 Volt 120ah Group 31 High Performance Marine AGM Deep Cycle Batteries EACH: Dimensions: 12.9"Lx6.8"Wx8.7"H (Height includes terminals) Weight: 75lb; 8mm terminals Maintenance Free Operation: There is no need to check specific gravity of the electrolyte or add water to VMAXTANKS. Can be mounted in any position Rechargeable Sealed battery resists shocks and vibration. High performance AGM technology for long lasting reliable power VMAX 12V, 120AH, BCI group 31 deep cycle marine battery with high capability to deliver current surges when needed. Safe and maintainance free AGM batteries built tough for tough applications. Ideal to power marine trolling motors and to power on board electronics. Batteries can be wired in series for 24V, 36V and 48V and in parrallel for higher capacities. Designed to maximize resistance to shocks and vibrations. With the electrolyte totally absorbed by the absorbed glass mat (AGM) between the VMAX plates this VMAX battery is classified as non spillable and non hazardous.