Sale Dual-Purpose Flooded Marine Battery, 675 MCA, Group 24
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$127.99

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Sale Dual-Purpose Flooded Marine Battery, 800 MCA, Group 27
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$143.99

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Sale Deep Cycle Flooded Marine Battery, 75 Amp Hours, Group 24
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$151.99

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Sale Deep Cycle Flooded Marine Battery, 90 Amp Hours, Group 27
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$159.99

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Sale Deep Cycle Flooded Marine Battery, 105 Amp Hours, Group 31
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$223.99

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Sale Dual-Purpose Flooded Marine Battery, 625 Reference MCA, Group 983
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$551.99

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Sale Dual-Purpose Flooded Marine Battery, 900 Reference MCA, Group 985
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$703.99

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Sale Dual-Purpose Flooded Marine Battery, 1280 MCA, Group 4D
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$343.99

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Sale Dual-Purpose Flooded Marine Battery, 1730 MCA, Group 8D
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$399.99

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Sale 6V Deep Cycle Flooded Marine Battery, 230 Amp Hours, Group GC2
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$215.99

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Sale 6V Deep Cycle Flooded Marine Battery, 370 Amp Hours, Group 8L16
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$383.99

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Flooded batteries, unlike other types, use a reservoir of liquid sulfuric acid, and produce hydrogen and oxygen when the battery is being charged. Vented wet cells allow the gases to escape into the atmosphere, unlike gel and AGM batteries, which recombine the gases and re-introduce them to the system. Hydrogen is an explosive gas, so battery boxes and compartments must be vented to let the gas escape safely.

Flooded batteries require maintenance—periodic inspection and topping-off with distilled water. They handle overcharging better than gel and AGM batteries, because of this hydrogen venting and because they are not sealed like the other types. They self-discharge at a higher rate (6% to 7% per month) and thus require off-season charging. Wet cells must be installed in an upright position and don’t tolerate high amounts of vibration. Their initial cost is lower than similarly sized AGM or gel batteries. Properly charged and maintained, wet cell deep-cycle batteries are capable of between a few hundred and over a thousand charging cycles.

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