How to choose an rv battery?

RoyF wrote:
I have always just gone to my dealer, and they always install a pair of Interstate batteries. I have a four-year-old pair of group 27 Interstates that are down to 50% charge, so it's time to replace them. There is a wide range of prices, so I am confused about what to do.

I see a group 27 rv-marine at Walmart for $82. How long is it likely to last?

Sears has a group 27 marine for $125. Camping World has a group 27 marine for $229.

Is this a matter of getting what you pay for? What to do??

If you do a lot of boondocking, or camping where there's no power, then consider 2 6v golf cart batteries. Will last much longer because they're designed to be deeply discharged and fully recover when recharged. "Marine" batteries are starting batteries meant to deliver a burst of power when starting an engine, not a lesser amount over a longer period. I got mine at Sam's for about $80 each, plus about $12 for a cross-over cable that's needed to connect them in series to make 12v.

This being said, if you only camp at campgrounds with hookups, then any good 12v battery(ies) will do.

Lyle