Duralast 24md dl Specs

The Duralast 24MD DL is a deep-cycle marine battery designed to withstand the demanding conditions boats often face. With its robust build and impressive power output, this battery aims to keep sailors powered on the open water.

Let’s take a closer look at the key features and specifications of the Duralast 24MD DL marine battery.

Spec Details
Battery Technology Flooded Lead Acid, Deep Cycle
Voltage 12V
Group Size 24
CCA (Cold Cranking Amps) 550A
MCA (Marine Cranking Amps) 685A
Reserve Capacity 140 minutes
Amp Hour 65Ah
Length 10.25 in
Width 6.81 in
Height 8.88 in
Weight 45.4 lbs
Warranty 1 year
Price $109.99

Battery Technology

The Duralast 24md dl utilizes flooded lead acid battery technology designed for deep cycle applications. Flooded lead acid batteries use liquid electrolytes, unlike absorbed glass mat (AGM) batteries, which contain immobilized electrolytes.

This makes flooded lead acid batteries less expensive than AGMs. The lead-acid construction also delivers reliable power for repeated deep discharges, ideal for running accessories when a boat’s engine is off.

As a deep cycle flooded battery, the Duralast 24md dl is optimized for powering marine electronics and accessories.


Duralast provides a 1-year free replacement warranty on the 24MD DL battery. This covers defects in materials and workmanship. With most marine batteries only offering a 6-12 month warranty, the one-year coverage provides peace of mind on your investment.

Group Size

This battery has a BCI group size of 24. The group size refers to its dimensions, with group 24 batteries measuring around 10 inches long x 6.5 inches wide x 8.8 inches tall. The 24 size is a common choice for small to mid-sized fishing and pontoon boats.

Marine Cranking Amperage

With 685 marine cranking amps, the 24md dl provides abundant starting power for boat engines. Marine cranking amps indicate the battery’s starting capability when powering a marine engine. The 685 MCA this battery delivers will reliably start most average sized inboard or outboard boat motors, even in cold weather.

Cranking Amperage

In addition to cold cranking power, this battery provides 685 marine cranking amps (MCA). MCA measures cranking power at 32°F. The ample MCA output will reliably turn over most marine engines.

Reserve Capacity

For deep cycling applications, the reserve capacity indicates how long the battery can run essential electronics before recharging. The 24MD DL offers 140 minutes of reserve capacity at 25 amps, enough for running navigation lights, fish finders, and radios during extended fishing trips.


With an MSRP of $109.99, the Duralast 24MD DL hits a reasonable price point for a marine battery with its performance specs and brand reputation. It costs a bit more than budget-priced options but delivers superior longevity and power.

Terminal Location

The battery’s positive and negative posts are located on opposite ends of the top. This allows for correct cable routing and easy connection. Both terminals use a standard threaded bolt design to hold cables securely.


At 10.25 x 6.81 x 8.88 inches, the 24MD DL fits in most battery trays intended for group 24 batteries. The compact size is convenient for boats with limited space. Total weight comes in at 45.4 pounds.


Weighing 45.4 pounds, the Duralast 24MD DL presents a middle-ground option between super lightweight and heavy-duty batteries. The robust but manageable weight contributes to the battery’s stability and vibration resistance.


This is a 12-volt battery, the typical voltage for starting and deep-cycling marine batteries. It can be used alone or wired sequentially to produce 24 or 36 volts for trolling motors and other accessories.

Additional Features

Some other noteworthy features of this battery include its solidium welds to prevent corrosion, Lifespan negative paste formula from enhancing performance and longevity, and optimized vent caps to reduce leakage. Duralast also manufactures the plates and builds the batteries in its own factories for better quality control.

In summary, the Duralast 24MD DL offers dependable cranking power and cycling capabilities in a rugged AGM design. While not the most powerful or highest-end marine battery, it provides good performance at a reasonable price point.

For weekend warriors and anglers seeking an affordable battery to repower their boat, the 24MD DL is a great option worth considering. It can handle general starting, lighting, and trolling needs for small to medium vessels.

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