Looking to replace my 2 group 31 batteries... After my last trip , with them being drained dead , it seems as though they are not acting like they should.. I am replacing them with 2 group 31 AGM's...

Just not sure if brands, 1 guy I know swears by Optima.... The other swears by Interstate.. ?? What to do ??

Joe

Optima D31M or optional D31M (less expensive). There is a promotion by Optima right now where they will extend your warranty by 1 year if you also purchase the charger to go with it. Optima offers a full replacement warranty of 3 years.

Reading over the various specs and reviews, Optima does seem like a great battery:

https://www.optimabatteries.com/en-us/bluetop-dual-purpose-deep-cycle-and-starting

Reading over the Interstate 31AGM7 Battery info, they also promote unbeatable performance outlasting other AGM's 2 times over. It looks like Interstate offers a 4 year warranty replacement.

http://www.interstatebatteries.com/m/product/agm

We use a lot of Interstate at work. They seem to perform well.

Here is a review on the Optima:

http://www.optimabatteryreview.com/

I don't know if you would go wrong with either.

Have you thought about Golf Cart Batteries for much greater power usage?

Who can you believe?

Both are 900 CCA.