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Wet Type

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With respect to the “wet”-type batteries there are standard batteries and those termed as maintenance-free. A maintenance-free battery has a beefier internal design and the plates may contain calcium, cadmium, or strontium to reduce out-gassing of the battery, which results in loss of water and reduced capacity and longevity. These lead-calcium designs are essentially a closed design battery and need no fluid maintenance over their life.

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