How to choose an rv battery?

[RoyF]

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??

[Artum_Snowbird]

It really is a bit of a guessing game. You can get a good vehicle starting battery with a 100 month warranty from Costco, or you can get an RV Marine battery at the same place with a 24 month warranty. My last vehicle battery for my truck went 11 years. I have never had a marine battery last that long.

I figure it works for me because I have never tended to draw my battery down like you might if you were running an electric motor on a lake boat. That is the RV Marine style.

[FCStreamer]

Battery technology has improved a lot, and deep cycle batteries are preferred for RV applications. There is a bit of "you get what you pay for", but there are deals to be had.

When it is time to replace my interstate batteries, I plan on buying Lifeline AGM replacements. I've read a lot of positive comments about these from fellow RVers. I also plan on replacing my charger with a multi-stage charger to maintain the batteries better.

http://www.bestconverter.com/Lifeline-AGM-Batteries_c_58.html