Quote:
Originally Posted by basora
CCA (Cold Cranking Amps) is NOT the same as Ah (amp hour) capacity.
BMW batteries are rated in Ah.
Research it and you'll be surprised how significant the difference is!
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AH rating is used for deep cycle batteries.
I don't understand why BMW uses a rating that applies to a battery that won't see regular usage (boats/planes/motorhomes).
Most all automotive battery manufacturers use an RC rating, how many minutes it takes a 25 amp load to drop voltage to 10.5.
Not very useful to know what a 1 amp load does to an automotive battery. Automotive batteries have a high draw at start up, alternator carries the draw from there.
03-04-2015, 06:27 PM
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