06-26-11, 08:39 PM
Do you know what size battery (group) goes in a 1969 Cadillac De Ville convertible?
Is it the battery group that matters or the cold cranking amps?
I had triple A jump my car a couple of weeks ago and the guy said the battery looked small for the size engine.
06-26-11, 09:40 PM
I think a 70-75 Amp. battery should go well. The relevant power measure refers to cold motor cranking power. It goes ok for my '69 472 SDV. I donīt think lifting roof top takes more power than cranking cold engine. In addition, you can operate roof with engine running, so battery should not be important for that purpose.
06-26-11, 09:53 PM
@CADforce69 thanks for the reply. My battery says DLG-24 (Battery Group 24) with 750 cold cranking amps.
Does that sound like the right battery group?
06-26-11, 10:09 PM
I think so. 72 Amps is more or less 680 cold cranking amps. My battery had to stand a lot of cold cranking when the car had some ignition problems and it never went out (about 5 minutes of cranking). If your battery has never given you any problem I would not change it.
For modern cars with 6 litre engines 100 Amp / 900 cranking Amps. are advised but original battery for '69 cadillac had a capacity of "74 ampere hours" according to shop manual.
06-26-11, 10:44 PM
when I bought a new one at napa i think the guy said 650 cold cranking amps was the correct size for the car...not sure but it starts the beast just fine.
06-26-11, 11:27 PM
If its a side post, Its probably a 75 or 78 group size battery.