What is the difference between dual purpose and deep cycle?

A dual-purpose battery can deliver engine-cranking current and tolerate moderate service discharges; a deep-cycle battery maximises long-discharge cycles but isn't optimised for starting. With a single battery on board, dual purpose is the right compromise.

Will a dual-purpose battery start my outboard?

Yes, as long as it meets the minimum cranking current (EN A or MCA) and capacity stated by the engine manufacturer. Also check the battery-box dimensions and terminal type.

How long does a marine dual-purpose battery last?

With proper charging and correct winter storage (charged and disconnected, or on a maintainer), a quality AGM dual purpose typically lasts several seasons. Repeated discharge below 50% shortens its life.

Can it be mounted at an angle?

Sealed AGM batteries tolerate different mounting positions and will not spill electrolyte as the boat rolls, although upright installation, well secured in its box, is recommended.

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Marine Dual Purpose Batteries

Marine dual-purpose batteries combine engine starting and on-board service power in a single block: navigation electronics, fish finder, lights, fridge or windlass. They are the practical choice for boats with limited space that don't want two separate battery banks.

We stock the dual-purpose ranges from Fullriver (AGM DC series), Varta Professional, Exide and Kronobat, covering everything from small motorboats and RIBs to sailing yachts and fishing boats.

Subcategories

FULBAT FDM Marine AGM Carbon

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EXIDE

Marine battery Exide EP800 12V 95Ah 850A AGM

12V

95Ah

850A

AGM

353 × 175 × 190 mm

5,00(2)

€133.30 VAT incl.

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Marine Dual Purpose Batteries

Subcategories

One battery to start the engine and run the boat

When to choose dual purpose

AGM technology: the usual choice on board

Frequently asked questions about marine dual-purpose batteries

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