U.S. Battery USL16HC-XC2 Group Size 903 6V 420A Deep Cycle Flooded Lead Acid Battery Building the best Flooded Lead Acid Battery on the market comes from a better battery cell design, hand-made construction, and attention to details. U.S.Battery Specifications Voltage: 6-Volt Deep Cycle, Case material: Polypropylene / Heat Sealed, 20 Hour Rate: 420, Minutes of Discharge @ 75 Amps: 250, Minutes of Discharge @ 25 Amps: 965, Length: 11.88 (302mm), Width: 7.12 (181mm), Height: 16.73 (425mm), Weight: 118 Lbs, Deep cycle batteries need to be equalized periodically. Equalizing is an extended, low current charge performed after the normal charge cycle. This extra charge helps keep all cells in balance. Actively used batteries should be equalized once per month. Manually timed chargers should have the charge time extended approximately 3 hours. Automatically controlled chargers should be unplugged and reconnected after completing a charge.