The Duralast 27dp DL is a deep cycle marine battery designed to provide reliable power to your boat. In this review we'll take a closer look at the key specifications and performance features of the Duralast 27dp DL and see how they stack up for marine use.
| specification | detail |
|---|---|
| Battery Technology | Inundated lead acid |
| guarantee | 1 year |
| Group size | 27 |
| Cold cranking amplifier | 800 amps |
| Ampere drilling | 0Amp |
| Reservation ability | 130 min |
| price | $112.99 |
| Terminal type | sae |
| Terminal location | Front top |
| Weight | 51.7 lbs |
| Voltage | 12V |
| length | 12.06 inches |
| width | 6.81 in |
| height | 8.88 inches |
| Battery Type | Deep Cycle |
| Marine Ranking Amplifier | 1000 amps |
| Top Features | Solidium welding, optimized grid, safe vent cap |
Battery Technology
The Duralast 27dp DL utilizes traditional flooded lead acid battery technology. The battery contains lead plates submerged in an electrolyte solution of sulfuric acid and water.
This is a proven battery chemistry known for its affordable price and reliable performance. When the battery is discharged, a chemical reaction occurs, releasing electrons, converting lead to lead sulfate on the battery plate.
When the battery is charged, the response will be reversed. Compared to sealed, unmaintained batteries, flooded designs require occasional electrolyte checks and toppings.
However, flooded batteries tend to have lower internal resistance and improve the capabilities of repeated deep cycling services. This makes it a popular option for the harsh demands of marine applications.
guarantee
The Duralast 27dp DL battery comes with a standard one-year replacement warranty. Although it is not the most extended coverage compared to some premium AGM batteries, this provides peace of mind against the flaws of early failure.
Warranty is valid if the battery is used in the appropriate application and maintained according to specifications.
Group size
The Duralast 27dp DL belongs to the group size 27 battery. Group size refers to the dimensions of the battery. Batteries are standardized to ensure compatibility between different battery brands.
The Group 27 battery is 12.06 inches long, 6.81 inches wide and 8.88 inches high. The 27dp DL weighs 51.7 lbs. Due to the large battery group size, the Duralast 27dp DL requires a special, oversized battery box to accommodate the footprint.
Cold cranking amplifier
An important specification for starting the battery is the Cold Cranking Amplifier (CCA) rating. This measures the battery's ability to start the engine at cold temperatures. The Duralast 27dp DL has a CCA rating of 800 amps.
This high power provides a lot of starting current even in cold winters. The rating of the Marine Ranking Amplifier (MCA) is even higher at 1000 amps, explaining the increased load on marine engines.
Ampere drilling
In contrast to cold cranking and oceanic cranking specifications, the basic cranking ampere for the Duralast 27dp DL is rated as 0 ampere. This number applies only to warm engine start scenarios of approximately 80°F, where minimal current is required.
For virtually all practical purposes, the CCA and MCA evaluations are important in practical operations. 0 AMP BASIC CRANKING The AMP specs show no degradation in performance.
Reservation ability
An important specification for dual-purpose marine batteries is their reserve capacity. This indicates the duration of time the battery can deliver useful discharge currents continuously in the event of an alternator failure.
The Duralast 27dp DL has a spare capacity of 130 minutes until the battery is drained to 1.75V/cell at 25 amps. This is enough for most boats.
Actual reserve times will vary based on the current draw. With 182 minutes with 12 amps of emissions, the Duralast 27dp DL offers all-day reserves.
price
The MSRP is $112.99 and the Duralast 27dp DL hits the reasonable price range for flooded marine batteries in this performance range. Typically, more affordable options reduce cycle life, while premium AGM models cost twice or triple.
Given the proven durability of the Duralast battery, the Duralast 27dp DL represents a high value option. Discounts from auto parts stores can further reduce prices.
Terminal location
Battery terminals are in the standard Group 27 front-top layout. The positive post is on the front left, and the negative post is on the front right.
Both terminals use threaded SAE bolt-on connectors. This allows you to easily replace battery cables and accessories without tools. The location of the sides and top terminals allows for flexibility in mounting configurations.
Weight
At 51.7 pounds, the Duralast 27dp DL is a fairly large battery. The large case size and thick lead plate required to provide high power output require considerable weight.
The battery is equipped with an integrated top-mount carry handle for easier transportation and installation. The weight also provides inherent stability when boarding.
Voltage
The Duralast 27dp DL runs on a typical 12-volt system. Multiple 12-volt batteries can be combined in parallel or in series to carry 24-volt and 36-volt marine electrical loads.
When connected in parallel, the voltage remains the same, but the overall capacity is doubled. In the series, voltage is added, but the capacity remains constant. This versatility helps the Duralast 27dp DL to help with multi-battery bank configurations.
Additional features
Other valuable features include optimized solid liquids of battery terminals to prevent corrosion and improve durability.
Patented grid manufacturing technology enhances efficiency and runtime. The vent cap is designed to be safe and to minimize leakage.
Overall, the Duralast 27dp DL makes an excellent choice as a dual purpose start and deep cycling battery for marine applications where reliable power is essential.
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