Quote:
Originally Posted by Ela1948
From my experience, exact match in AH or size is not an issue. What needs to be the same is the same age of the battery and the same type of battery. Meaning that if you have a AGM or flooded battery, stay with the same type.
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Ela1948 is correct. Same age is important, and I forgot to mention that. And although it won't hurt anything for them to be rated at different amp-hours, if they are not, one will discharge faster than the other and actually draw the other one down more quickly, trying to keep a balance between the two, especially when you aren't using much electricity. (Those electrons are pesky little devils! They want to flow from the highest charge to the lowest until there is a balance.)
And absolutely do not mix different types, such as flooded wet cell and maintenance free, etc. And the marine or deep cycle batteries are the best, as they are designed to last longer.
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Scoutr2 (Mike)
2015 Jay Flight 32RLDS Elite
2012 Chevy 2500HD Crew Cab LTZ (6.6L Duramax/Allison)
Equalizer Hitch (1200# bars)