Home Marine batteries Best Dual Purpose Marine Battery
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To begin with, I propose to consider what a dual purpose marine battery is.

Traditionally, while choosing from a huge variety of different products, the best dual purpose marine battery still remains worthy on the market because people are used to its reliability and power. If we see the word “dual”, we can conclude that such batteries perform the function of both traditional deep cycle and starting batteries.

As for me, dual purpose marine batteries are incredibly convenient, because, for example on fishing boats, the electronics onboard work on the basis of a starting battery. In fact, you need to understand that they have the power to run the outboard motor and the power to power the electronics for a full day of use. That is why, by choosing those types of batteries, you immediately save energy, time, money, and at the same time get a universal device for powering all your electronics.

Explore more about the best deep cycle marine battery

Dual Purpose Marine Batteries Comparison Table

Battery Voltage Capacity, Ah CCA MCA Group size
Optima Batteries 8052-161 best overall 12 75 900 1125 31 Review
Odyssey 34M-PC1500ST 12 68 850 1050 34 Review

Best Dual Purpose Marine Battery Reviews

Optima Batteries 8052-161 – best dual purpose marine battery

Optima Batteries 8052-161

Optima Batteries 8052-161 are an incredibly good option on the market. Along with a wide range of pleasant bonuses and features, you actually get the best dual purpose marine battery. By installing this battery on your boat, you get the exceptional running time and more recharges than you’d get out of a traditional battery. With a capacity of about 75 Ah and fast charging, you can forget about the worry of recharging. What’s more, the battery has a solid Reserve Capacity of 155 extra minutes.

Optima delights the user with the fact that inside each battery there is a set of individual spiral-wound cells comprised of two pure lead plates coated in a precise coating of lead oxide. One coated plate is positive and the other is negative. This is what makes the 8052-161 a very reliable product. In addition to the 12-watt voltage rating, the battery also features Higher cranking power up to 900 Cold Cranking Powers. Optima Batteries 8052-161 also boasts a good MCA of 1125.

Key specs

  • Nominal voltage : 12
  • Capacity, Ah: 75
  • CCA (Cold Cranking Amps): 900
  • MCA (Marine Cranking Amps): 1125
  • BCI group size: 31
  • RC (Reserve Capacity): 155 min
  • Dimensions (L x W x H), cm/inch: 30.4 x 15.2 x 22.8/12.8 x 6.5 x 9.3
  • Weight, kg/lbs: 26.7/59.8


  • Features really high cranking power
  • Features extremely high reserve capacity for little less than two active hours


  • Extremely heavy to carry in comparison to similar batteries

Explore more about the best marine starting battery

Odyssey 34M-PC1500ST

Odyssey 34M-PC1500ST

When it comes to dual purpose marine batteries, I can’t help but remember the Odyssey 34M-PC1500ST. This device is thought out to the smallest detail and incredibly easy to use. AGM dual purpose marine battery is incredibly nice to have because Odysseus did a good job and as a result, we get 15% more plate surface area which allows more power and reserve capacity by avoiding the dead space between cylinders. In addition to this, With its AGM feature, it eliminates acid spills, high conductivity, high integrity terminal seal, and a self-regulating relief valve.

Speaking more precisely about the specifications, the discussion of the battery cannot be overlooked. With a built-in capacity of 68 Ah, forget to worry about recharging. In addition, the reserve volume is also pleasing, being 134 extra minutes. If you add to these indicators 12 nominal voltage and the human factor – respect, care, and proper charging, you get an incredibly valuable product. It also boasts a good 850 Cold Crank Amp and 1050 MCA.

In addition, the Odyssey 34M-PC1500ST, as the best deep cycle marine battery, boasts its temperature tolerance. You no longer need to worry about overheating or freezing, forget. The 34M-PC1500ST will operate without any problems from -40 ° C all the way up to 80 ° C (-40 ° F to 176 ° F).

Key specs

  • Nominal voltage : 12
  • Capacity, Ah: 68
  • CCA (Cold Cranking Amps): 850
  • MCA (Marine Cranking Amps): 1050
  • BCI group size: 34
  • RC (Reserve Capacity): 134 min
  • Dimensions (L x W x H), cm/inch: 25.4 x 15.2 x 17.7/10.8 x 6.8 x 7.2
  • Weight, kg/lbs: 22/49.5


  • Features an exceptional vibration resistance to provide the user with maximum comfort
  • The greatest combination of good price and performance with very good both battery and CCA volume
  • Incredibly loyal to temperature extremes, from coldest to incredibly high


  • During usage, no cons were found