So I have a duralast gold battery in my 99 Honda Civic with a new 130 amp alternator. And I have another pretty new duralast gold battery in my garage. I want to hook the second one up cause my soundstream rub1.2500d is a huge power hog. It's on my Sq hdc3 12. My question is would I wire the second battery in parallel or series? Another question is would that second duralast gold battery work or should I pick up an optima yellow top? Thanks
