If you want to be technical, CCA is the amount of amps delivered at 9.6v @ 0 degrees F.
Cranking ampers is at 32 degrees, and hot cranking amps is at 80F.
CCA / .4 = CA
CA * .65 = HCA
(roughly)
S.Stew, heating or hot charging (over charging) the batteries does make sense as they will take on a little more of a surface charge. I'm not sure if they can handle another 40% more of their capacity, but I could see it.
Speaking of heating batteries, I work in a batty shop and line charge 12-24 batteries at a time. Several times one or two has failed on the charger and the increased voltage to the others has gotten several hot enough that the plates in the battery have melted through the battery case. They were so hot that after letting them sit 9 hours they were still physically warm to the touch. Youch.
