What is the difference in CCA and CA or HCA?
CA and HCA stands for Cranking Amps and Hot Cranking Amps these ratings are the same as CCA, but are typically tested at 32F and 80F respectively. These ratings may be useful for people not living in cold weather climates. The 32F and 80F rating are also sometimes referred to as MCA, or Marine Cranking Amps.