OPTIMA BlueTop D27M Dual Purpose AGM Marine Battery
- 12-Volt, 800 cold cranking amps, MCA 1000
- 66 AH C20 capacity
- 140 minutes reserve capacity
- Dual SAE and 5/16" stainless studs
- 12.19" x 6.81" x 8.75"
- 53.8 pounds per bullets
- 24-month guarantee
Updated 20 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A dual purpose sealed AGM battery for boats and RVs that need both strong starts and deep cycle accessory power. The listing gives two very different weights, so plan mounting for the heavier figure.
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ASIN: B001UFXHQIModel: BlueTop D27MCategory: Vehicle Batteries
Overview
Spiral wound cells of nearly pure lead are the core of this OPTIMA BLUETOP battery, packed tightly so they resist vibration and deliver strong cranking current. The sealed AGM design is spill proof and mounts in almost any position.
Boat and RV owners get one battery that starts the engine and runs accessories, without topping up water. The weight is stated two ways in the listing, so confirm before sizing a tray.
Who it's for
Boaters with fish finders, trolling accessories or RV owners with large accessory loads will use both roles. Owners of large house banks may prefer dedicated deep cycle batteries.
Pros and cons
- Starting and deep cycle in one
- Spill proof, any position
- Strong vibration resistance
- Dual SAE and stud posts
- Listing weight figures conflict
- Moderate amp hours for house use
Performance notes
Cranking power comes from the spiral cell layout and low internal resistance, which holds voltage up during starts. Deep cycle use draws on the reserve capacity, and the AGM design accepts charge faster than flooded batteries. Vibration resistance comes from tightly wound cells that cannot shift.
Specifications
| Brand | OPTIMA |
|---|---|
| Model | BlueTop D27M |
| Dimensions & fit | |
| Item Dimensions D x W x H | 12.19" L x 6.81" W x 8.75" H |
| Item weight | 53.8 pounds (bullets); 25 pounds (specs) |
| Capacity & performance | |
| Capacity | C20: 66 AH |
| Reserve capacity | 140 minutes |
| Power & efficiency | |
| Voltage | 12 volts |
| Battery Type | Lead Acid, sealed AGM |
| Compatibility & installation | |
| Compatible with Vehicle Type | Boat |
| Warranty & support | |
| Manufacturer Warranty Description | 24-month guarantee |
| Other details | |
| Terminal | Dual SAE & 5/16" Stainless Steel Stud Posts |
| Number Of Cells | 6 |
| Cold cranking amps | 800 CCA |
| Marine cranking amps | MCA 1000 |
Frequently asked questions
What size is the OPTIMA BLUETOP D27M?
12.19" long x 6.81" wide x 8.75" tall. Weight is given as 53.8 pounds in the bullets and 25 pounds in the specs.
Can it be used as a starting battery?
Yes. It is dual purpose for both deep cycle and starting applications, with 800 cold cranking amps.
Does it need water added?
No. It is maintenance free and spill proof.
Can I mount it on its side?
The description says it is mountable in virtually any position.