What is Pulse Hot Cranking Amp rating?

Unlike CCA and MCA the pulse hot cranking ampere (PHCA) rating does not have an "official" definition; however, we believe that for true engine start purposes, a 30 second discharge is unrealistic. With that in mind, the PHCA is a very short duration (typically about 3 seconds) high rate discharge. Because the discharge is for such a short time, it is more like a pulse.

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