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Internet # 205309650

Model # 31MDC

Store SKU # 1000053151

31 Deep Cycle Marine Battery

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  • Provides long and continuous operation
  • Perfect for motors, live wells, fish finders and inverters
  • Battery can be easily recharged for optimal use
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Return this item within 90 days of purchase. Read Return Policy

Product Details

About This Product

Exide Nautilus Marine / RV Deep Cycle batteries are designed to provide continuous operating time to run trolling motors, live wells, inverters, depth/fish finders, etc. They can be discharged and recharged many times without damaging the internal components of the battery. Incorporates thicker grids, denser active materials on the plates and alloys specifically designed to provide many cycles. Lead/antimony construction provides the proper combination of alloy composition and active material for cycling. Stainless steel threaded and SAE posts provide ease of installation and permit uncluttered wiring harness for electrical connections.


  • 725 cold cranking amps at 0°F
  • 900 cranking amps or marine cranking amps at 32°F
  • 205 minutes reserve capacity at 25 Amp
  • 115 Amp at 20 hour (115 Ah) - reference rating
  • 12-month free warranty
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 205309650

Model # 31MDC

Store SKU # 1000053151

Additional Resources

Shop All Nautilus
From the Manufacturer


Dimensions: H 9.875 in, W 13 in, D 6.8125 in


Product Depth (in.)

6.8125 in

Product Height (in.)

9.875 in

Product Width (in.)

13 in


Battery Application


Battery Capacity (mAh)


Battery Size


Cell Type


Cold cranking amps (CCA) at 0 F


Cranking amps (CA) at 32 F


Electrolyte type

Battery Acid

Group size (BCI)


Number in Package


Reserve capacity (min.)




Safety & Security Product Type


Terminal Type


Voltage (V)


Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

4.3 out of 5

  • 4.3 out of 57 reviews
  • 91% recommend this product
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Showing 1-10 of 57 reviews
Doesn't fit into my Newport Vessels Battery Box
I bought this battery to go into my Newport Vessels battery box, but sadly it doesn't fit. The battery goes in easily but because the terminals are centered on the battery and not to a side like other batteries the cover of the box doesn't fit. I really wished it had work, this is the cheapest Group 31 battery I found with great reviews.
    5 found this review helpful
    I bought the battery for my 6115 John Deere tractor. Its physical dimensions are the same as the original battery that came with the tractor and it ‘s cheeper that the JD battery. It works well on the tractor and fits perfectly in the battery compartment. It supplies plenty of power to easily turn over the engine and start the tractor. One huge advantage is the battery posts are in the center at each end of the battery making easy to attach the battery cables. it is very adaptable for usage in several different battery installations. The center posts make it easy to attach the battery cables because the battery can be installed with the positive post on the right or left depending on the requirement.
    • Verified Purchase
    The battery leaked. Returned it. Went to other retailer and got the same battery for $70 cheaper
    • Verified Purchase
    1 found this review helpful
    Strong long lasting battery. A lot of juice....
    Strong long lasting battery. A lot of juice.
    • Verified Purchase
    Worst battery I ever bought
    I have bought marine deep cycle batteries for 40 years and this battery is the worst. It is returnable within 90 days and this battery would not hold a charge after 13 months. While fishing it won't last 4 hours on 12 volt 55lb. trolling motor.
      The battery in the store is a lower rating than...
      The battery in the store is a lower rating than what is pictured on the website 840 v 900 mca 105 v 115 ah paying the same for less battery!
      • Verified Purchase
      1 found this review helpful
      Great battery
      So far battery is great. Put it in my bass boat for my trolling motor. Lasts all day charges up quick. Will buy again.
      • Verified Purchase
      • Recommended
      Battery weight
      My old Interstate batteries weighed in at 84 1/2 pounds, these weigh in at only 52 pounds and so far I have been much happier with the Exide Nautilus
        • Recommended
        You cheapened out the battery. The description online states...
        You cheapened out the battery. The description online states this battery has 115 Amp Hours. The batteries in the store only has 106 Amp Hours. I wanted the battery with the higher amp hours but it looks like all battery manufacturers are cheapening out their battery lines instead of just increasing prices.
        • Verified Purchase
        2 found this review helpful
        Very strong battery can you use it almost all day...
        Very strong battery can you use it almost all day without pulling it down and charges up quickly
        • Verified Purchase
        Showing 1-10 of 57 reviews