Evening Gentlemen, I have a Duracell Marine & RV Deep Cycle 500 CCA & 615 MCA.
I forgot to take it out of the camper for super cold temps and it was NOT plugged in to trickle.....it is on life support machine right now trying to resuscitate it.
I am in the process now to install an OEM box and a second battery to mirror the original battery.

All that said, my question is, IF I have to buy another battery (or two), first all, I know that both batteries need to have the same specs, all that said again, do I need/want deep cycle batts and are my specs listed good numbers?

Thanks
Ray