Best Boat Battery Exchange Policy?

[spoon33]

What is the best/longest exchange policy you have found on deep cycle batteries. I bought 2 from Walmart 20 months ago, and they told me it was only 18 month warranty and not 2 years as I thought.

So looking for 2 new batteries, but don't want to be hung with dead ones in a few years again.

[TRCM]

Sears PM-1....3 yr warr...............but quite $$$ to buy

[blackgts2002]

says right on the walmart batteries that the 18 months is free replacement and after that it is pro rated