What is a calcium battery?

A calcium battery is a lead acid battery with no antimony in its grids. Instead, a calcium component (around 1%) is added to both the positive and negative plates. This works to reduce water loss through gassing in the battery and allows the battery container to be fully sealed and maintenance-free. Calcium batteries are less likely to be affected by extreme weather conditions and higher charge rates, so many modern cars now use them to combat higher power demands.

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