Many myths have a root in fact..
The myth: In a multi-battery set up ALL batteries MUST be identical.
The rooting fact: When you put batteries in SERIES such as a pair of GC-2 to make a big 12 volt (Basically a 4D) or a pair of 12's to make 24 volts for a Semi truck or construction gear.. THOSE batteries MUST be identical.
But when you parallel them.. This is not the case. They need to be the same type and class. (IE: all flooded wet cell or all maintenance free). though even there some folks have mixed AGM and Flooded with little issue.
GO FOR IT
Suggestion: use very high current Andersons.. Like tow truck jumper cable connectors.
