Quote:
I wish that a 1000 owner group of Cummins Ram owners
with dual batteries under the hood
would volunteer to do a long term test
with both a marine and automotive rated battery

Never put mismatched batteries in parallel. They won't have the same charge/discharge profile which will eventually damage both of them. Batteries in parallel should always be changed in matched sets even if only one is bad.

Last edited by GomangoCuda; 05/18/18 02:43 PM.
In theory, there is no difference between theory and practice. In practice, there is.