My secondary battery has more CCA is that a problem?

[mrpep]

I have a 675 CCA battery and now added a secondary that has 850 cca or something like this. Will this be a problem? I read that the secondary should be equal or less.

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[peterletran 10+ year member]

ASK THE EXPERTS: Batteries in Series & Parallel | Home Power Magazine

Serial and Parallel Battery Configurations and Information

I'm not sure how factual these posts are, but I've had 2 different batteries of 2 different ages and 2 different sizes before hooked up in parallel with no issues for a long time, in the past.

But ... on the safe side, you can get a 12volt relay for well under $50:

100A 12v CONTINUOUS duty Relay SOLENOID 100 amp 12 volt NEW for cars truck hho - Other

I'm currently running a conventional noname crap brand under the hood isolated from a Kinetik HC2000.