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What is a HCA rating?

HCA rating
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What is a HCA rating?

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The abbreviation HCA stands for hot cranking amps. It is the same as MCA, CA or CCA, except that the temperature at which the test is conducted is 26.7C (80F ). What is the PHCA rating? Unlike CCA and MCA the pulse hot cranking amp (PHCA) rating does not have an official definition; however, we believe that for true SLI purposes, a 30-second discharge is unrealistic. The PHCA, a short duration (about 3-5 seconds) high rate discharge, is more realistic. Because the discharge is for such a short time, it is more like a pulse.

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