IceMan55
My BigDog
I call BS.
There are only a few real manufacturers of batteries in the world. Non of them advertise a 500+CCA AGM Battery in that size. Therefore you must ask yourself, where is this coming from.
It's coming from a marketing dept that doesn't understand proper CCA testing and even likely the difference between CA and CCA.
Also for example when you have a battery load tested at a shop and are given the CCA, know that his is a ESTIMATE sionce I don't know of any ship I have ever u that is setup to properly conduct a CCA test. To do CCA test the battery is to be taken after the battery is at 0 degrees for 24hrs. Even a CA test the battery is suppose to be at 32F for 24hrs. Load testers estimate based on a math curve what it should be but there are many factors that can not be accounted for that way and I have seen more than my fair share of batteries that test ok for CCA but fail in real world.
Caveat emptor
What battery can you recommend for best starting power?