Our 2 Wally World 12 volt deep cycle batteries have served us well the past couple years on our TT. Wife and I don't boondock but our fridge is residential and has worked well on 9 to 10 hour trips on the road. Also use fresh water tank and water pump when on the road. Only reason I'm considering switching them out for 2 6 volts is because it's time to replace our pontoon boats deep cycles. I have them powering a trolling motor on the pontoon for fishing and some electronics. They are still in good shape always maintened with charging and fluid checks. My question is what are good mid range priced 6 volts to add to the camper? Not looking for high end or cheap ones. Basically would be powering residential fridge, water pump and one slide to move out and in to access fridge on lunch breaks. Nice to have more battery storage if camp ground power went out for awhile.