Is it OK to mix battery types??
I have a new trailer along with its accompanying new 12v deep cycle battery. I also have a nearly new large 12v diesel starting battery just sitting in the garage. I would like to hook them up togethe...
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Generally a bad idea. It's unlikely that they will hold a consistent charge which means the weak battery will constantly be drawing the better battery down.
If you want to take the trouble to wire them up as separate banks that are kept isolated except for charging, that's OK.
If you want to take the trouble to wire them up as separate banks that are kept isolated except for charging, that's OK.
