Battery RC

RC = Residuel Current.
CCA = Cold Cranking Amps.

Fab = Fat Aussie Bastard.

BatteryFAQ

Everything you ever wanted to know about batteries :)

RC or reserve capacity is just another one of those BS marketing terms the battery industry ( probaly the americans) has come up with instead of providing a proper set of battery specs and some dischage curves.

It allows an easy and over simplistic comparison between batteries.

and then they even fiddle with that from time to time.
it should be specified as RC25...the capacity of the battery in minutes at 25 amps drain.

A more or less useless figure unless you are drawing 25 amps.

To make any use of it you need to calcuate it back to amp hours, but it wont give a consistent AH figure because bigger batteries will show a greater capacity by this method.

God help us if we were given a simple AH rate at the 10 hour rate and some simple discharge curves......we might be able to make reasonable comparisons between batteries and sensible engineering calculations.

ARRRRGGGGH

cheers