Customer Reviews for Nautilus 31 Deep Cycle Marine Battery

Good items

This is the second of these batteries I have bought. It was to replace a competitors brand that was nothing but useless and in fact I paid more for. That first exide? Is now 3 yrs old and still going strong. I predict similar performance from this one as well.

After spending a fair amount of time looking at lead-acid deep cycle batteries on-line, I felt the Nautilus had the best ratings, comparable warranty, and similar price to the other batteries I looked at. I have had a Nautilus battery in the past and have had good service from it.

was dated 12/2019 and I bought it in April 2020 so as you can imagine, it took two days to charge with a 15 amp charger.

Perfect condition..... Is everything said to be.

Working well in the short run

After first charge it ran a 30" refrigerator in my van for about 8 hours until i got to my destination. Thanks Home Depot

I use 8 of these batteries for power on a solar system at my hunting lodge. No complaints. They work and last as intended.

I have purchased these in the past and always had good performance. I just wish the stored would rotate the battery stock versus selling batteries with 6+ months of sitting on the shelf. The two I found at my store were less than a month old. Still need one more which is why I have noticed other stores with old batteries.

Rating provided by a verified purchaser

Rating provided by a verified purchaser

Rating provided by a verified purchaser

So far so good. Used it as a trolling motor battery. Well worth the price!!

This battery ran my deer camp heater and lights all through the night and out lasted my yellow top deep cycle in hrs of use . Well worth the money

Best price in city of phx wit one year warranty ...hands down....i use them for my straight truck (3 per truck)

good product for the price

I liked the lifting handle and that it fix my application.

Foes what a new battery should

Yes... it met expectations!

Excellent battery at a reasonable price

I have a bank of 4 of this type of battery. Excellent. Runs a small freezer during the day, tv, lights, blender, and a fan all night in my offgrid summer home. Cannot beat the price anywhere.

I give these batteries and the online sales/pickup process 5 stars. It's too early to review the performance so overall I'll give them 4 stars. I hope I feel good about the batteries in a few years. I was pleased to find Group 31 Marine batteries at a good price.

The batteries don’t hold any more juice than the 2 interstate batteries that were size 27. Added weight to my boat, for no added motor life

Exceptional low price for this battery.

I use Type 31 Deep Cycles as a 12v power backup for my ham radios, for emergency or field operation. This is the second of these Exide 31MDC batteries that I have bought. The first one came virtually fully charged. However, this second 31MDC, that I just bought, must have been sitting on the shelf for a long time or was never properly charged at the manufacturer. I used my battery load tester to check it when I got it home, and the charge was way down. I placed the 31MDC on my 4.3 amp charger/maintainer on the appropriate setting for this season and this battery, but, it took almost two full days of charging to bring this battery up to full operational standby charge. [Ironically, at the same time, it took only one day for my other charger (same brand and rating) to fully recondition and recharge my 12 year old Autocraft M24-1 deep cycle battery (even though my battery load test meter indicated the M24-1 was in need of replacement.] If you want to buy a fresh battery, I recommend that wherever you shop for it, that ask them to load test the battery before taking it with you, or else test it yourself.

We looked for a group 31 battery that could handle running it dead to fully recharging over and over for our Hookah Diving business. We tested quite a few and this battery out performed: AGM, Interstate,Duracraft and Batteries Plus hands down. None of them could handle the reserve capacity like this Exide 31MDC. You would have to go up to a 8D battery to surpass the performance. If your looking for a great price Marine battery that won't strand you this would be my pick.

Excellent battery for the price. Use it in my RV. Runs a flat screen TV, DVD player and lights for 6 to 8 hours at night and still has about 50% charge left. Recharged by solar during the day. Going to add a second one soon.

200 MINUTES RESERVE AT 25 AMPS. JUST WHAT I NEED FOR MY SOLAR SYSTEM. HEAVY DUTY PLATES FOR MANY CYCLES OF DISCHARGE AND RECHARGING.