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CCA is a discharge for thirty seconds at the rated CCA in Amps normally done in a laboratory at -18 Deg C after a minimum duration of 16 hours in freezer with the battery condition charged at 100% prior to placing in the freezer.

This is not practical in a service centre but portable discharge-units are available which can load the battery at half the CCA rate for 15 seconds without too much heat being generated giving a useful load voltage result >9.6 Volts

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12y ago

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