VMAX MR86-50 12 Volt 50Ah AGM Deep Cycle Sealed Lead Acid Battery (7.8" L x 6.6" W x 6.7" H) 12V 50Ah AGM Deep Cycle SLA Maintenance Free Battery Marine Cranking Amps: 450A; Reserve Capacity: 100 Minutes Dimensions (inches): 7.8"L x 6.6"W x 6.7"H, Weight: 32lb Heavy duty grids provide an extra margin of performance and service life in either float or cyclic applications, even after repeated over discharges Will power a 40lb thrust motor for 3-5 hours of continous trolling at medium to low speeds