12V 75AH 900CCA Bluetop Marine Battery (D31M)

🔋 OPTIMA BLUETOP D31M AGM MARINE BATTERY – 12V 75AH 900CCA 1125MCA

High-Performance AGM Marine Battery – 900CCA Starting Power, 1125MCA, 75Ah C20 Capacity, 155-Minute Reserve Capacity & Type M Terminals

🚤 Designed for demanding marine, RV and mobile power applications, the Optima BLUETOP D31M AGM Battery combines powerful engine-starting capability with substantial stored energy, strong vibration resistance and fast recharge performance.

With 900CCA, 1125MCA, 75Ah C20 capacity and a 155-minute reserve capacity at 25A, the BLUETOP D31M provides a strong combination of cranking power and runtime for compatible 12V marine and recreational vehicle systems.

Optima SpiralCell Technology uses 99.99% pure lead and spiral-wound construction to support consistent power delivery, durability and faster recharge performance compared with conventional flat-plate battery designs.

The supplied product information states that BLUETOP batteries can provide up to three times more recharges than traditional marine batteries, up to three times longer service life than standard flooded batteries and up to 15 times greater vibration resistance under applicable operating conditions.

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⚡ KEY FEATURES

⚡ 900CCA Starting Power
Provides powerful cold-cranking performance for compatible 12V engine-starting applications.

🚤 1125MCA Marine Cranking Power
Provides substantial marine cranking output for compatible boat and marine engine applications.

🔌 75Ah C20 Capacity
Provides substantial stored energy for compatible onboard accessories, equipment and electrical loads.

⏳ 155-Minute Reserve Capacity
Supplied reserve capacity is approximately 155 minutes at a 25A load.

🚤 Marine & RV Application
Designed for compatible boats, recreational vehicles and other demanding mobile power applications.

🌀 SpiralCell Technology
Optima’s spiral-wound internal cell construction is designed to provide consistent power delivery and durability.

🧪 99.99% Pure Lead
The supplied product information specifies 99.99% pure lead within the SpiralCell design.

🔄 Faster Recharging
Designed to recover battery charge efficiently after engine starting or periods of electrical use.

💪 Strong Vibration Resistance
The supplied information states up to 15 times greater vibration resistance than a standard flooded battery.

🔁 More Recharge Cycles
The supplied information states up to three times more recharges than a traditional marine battery under applicable conditions.

⏱️ Extended Service-Life Design
The supplied information states service life of up to three times longer than standard flooded batteries under applicable conditions.

🛡️ AGM Construction
Absorbent Glass Mat technology provides maintenance-free and non-spillable operation.

🧰 Maintenance Free
No routine electrolyte topping-up or fluid maintenance is required.

💧 Completely Non-Spillable
The AGM design provides non-spillable operation under normal conditions.

↔️ Flexible Mounting
The supplied information states that the battery can be mounted in many positions, subject to correct installation requirements.

🔩 Type M Terminals
Uses the supplied Type M terminal configuration for compatible marine and vehicle installations.

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🚤 HIGH-PERFORMANCE MARINE POWER

The Optima BLUETOP D31M is designed for marine applications requiring strong engine-starting power, substantial stored energy and rugged AGM construction.

Its 900CCA and 1125MCA ratings provide strong cranking capability, while the supplied 75Ah capacity and 155-minute reserve capacity provide useful stored energy for compatible onboard electrical systems.

This combination makes the D31M suitable for demanding compatible marine and RV applications where battery performance needs extend beyond basic engine starting.

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⚡ 900CCA COLD CRANKING POWER

Cold Cranking Amps: 900CCA

The supplied 900CCA rating indicates strong engine-starting capability under the applicable cold-cranking test conditions.

⚠️ IMPORTANT: Confirm the engine, vehicle or equipment manufacturer’s minimum required CCA before selecting a replacement battery.

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🚤 1125MCA MARINE CRANKING POWER

Marine Cranking Amps: 1125MCA

The supplied MCA rating provides a marine-focused measure of the D31M’s starting-current capability.

This makes the battery relevant to compatible marine engine applications requiring substantial cranking output.

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🔌 75AH C20 CAPACITY

Supplied C20 capacity: 75Ah

The C20 rating represents battery capacity measured over a 20-hour discharge test under specified conditions.

The D31M’s 75Ah capacity provides substantial stored energy for compatible marine, RV and accessory loads.

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⏳ 155-MINUTE RESERVE CAPACITY

Supplied reserve capacity at 25A: 155 minutes

Reserve capacity indicates how long the battery can support a specified electrical load under applicable test conditions.

Actual runtime will vary according to electrical load, temperature, battery condition, state of charge and operating conditions.

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🌀 OPTIMA SPIRALCELL TECHNOLOGY

Optima BLUETOP batteries use SpiralCell Technology rather than conventional flat-plate construction.

• Spiral-wound internal cell construction
• 99.99% pure lead
• Strong starting-current delivery
• Consistent electrical performance
• Strong vibration resistance
• Fast recharge capability

The supplied product information states that this construction delivers more power and consistently outperforms conventional flat-plate battery designs.

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🔄 FASTER RECHARGING

Fast recharge capability is one of the supplied benefits of the Optima BLUETOP range.

This can help the D31M restore battery charge efficiently after engine starting or electrical use when connected to a suitable charging system.

⚠️ IMPORTANT: Ensure the alternator, charger or battery-management system is suitable for AGM battery charging requirements.

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🔁 UP TO THREE TIMES MORE RECHARGES

The supplied product information states that BLUETOP batteries can provide up to three times more recharges than a traditional marine battery.

This can be valuable in applications where the battery is regularly discharged and recharged during normal operation.

Actual cycle performance depends on discharge depth, charging conditions, temperature, storage and overall battery management.

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💪 HIGH VIBRATION RESISTANCE

The supplied product information states that BLUETOP batteries can provide up to 15 times greater vibration resistance than a standard flooded battery.

This is particularly relevant to marine and mobile environments where movement and vibration can place additional stress on conventional battery construction.

⚠️ IMPORTANT: Vibration resistance does not eliminate the requirement for a secure battery tray and appropriate hold-down system.

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⏱️ LONG-LIFE DESIGN

The supplied product information states service life of up to three times longer than standard flooded batteries under applicable operating conditions.

Actual battery life will vary according to:

• Depth of discharge
• Frequency of cycling
• Charging-system performance
• Operating temperature
• Electrical loads
• Storage conditions
• Installation quality

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🛡️ AGM – ABSORBENT GLASS MAT CONSTRUCTION

The Optima BLUETOP D31M uses AGM battery technology.

AGM construction retains the electrolyte within absorbent glass mat separators rather than leaving free-flowing liquid inside the battery case.

• Maintenance-free operation
• Non-spillable construction
• Strong vibration resistance
• Flexible mounting options
• High starting-current capability
• Fast recharge performance

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🚤 MARINE APPLICATIONS

The BLUETOP D31M is designed for compatible marine installations requiring strong starting performance, useful stored energy and dependable AGM construction.

Its high cranking ratings and substantial 75Ah capacity make it relevant to compatible boats with onboard electrical systems and accessories.

⚠️ IMPORTANT: Marine use alone does not confirm compatibility. Check system voltage, starting requirements, dimensions, terminal arrangement, battery restraint and charging-system requirements before installation.

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🚐 RV & MOBILE APPLICATIONS

The supplied product information also positions the BLUETOP range for compatible recreational vehicle use.

Its combination of strong starting performance, useful capacity and rugged AGM construction can suit compatible RV and mobile electrical applications.

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🔩 TYPE M TERMINALS

The BLUETOP D31M uses:

Terminal type: Type M

Confirm the exact Type M connection requirements, terminal positions, polarity and battery-cable compatibility before purchase.

⚠️ IMPORTANT: Do not select the battery based only on voltage, CCA, MCA, capacity or external dimensions. Terminal configuration and polarity must also match the intended installation.

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🧰 MAINTENANCE-FREE OPERATION

The AGM construction eliminates routine electrolyte topping-up associated with serviceable flooded batteries.

This provides convenient maintenance-free operation under normal use.

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💧 NON-SPILLABLE CONSTRUCTION

The supplied product information describes the BLUETOP range as completely non-spillable.

This provides greater installation flexibility than conventional flooded batteries containing free-flowing electrolyte.

⚠️ IMPORTANT: Always follow Optima and the vessel, vehicle or equipment manufacturer’s requirements regarding mounting orientation, battery restraint, ventilation and electrical installation.

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🚤 SUITABLE APPLICATIONS

• 🚤 Compatible boats
• 🛥️ Marine engine-starting applications
• 🚐 Compatible RVs
• 🏕️ Recreational vehicle electrical systems
• 🔌 Applications with substantial electrical loads
• ⚡ High-starting-current applications
• 🔋 Applications requiring substantial 75Ah capacity
• 🛠️ High-vibration environments
• 🔧 Compatible AGM battery upgrades
• 🔩 Applications requiring Type M terminals

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📏 DIMENSIONS & WEIGHT

Length: 12.81in

Width: 6.56in

Height: 9.38in

Weight: 59.8lb

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📋 TECHNICAL SPECIFICATIONS

Brand: Optima

Product: BLUETOP D31M AGM Marine Battery

Battery type: BLUETOP

Model: D31M

Battery chemistry: AGM

Cell technology: SpiralCell

Supplied lead purity: 99.99%

Nominal voltage: 12V

Starting power: 900CCA

Marine Cranking Amps: 1125MCA

C20 capacity: 75Ah

Reserve capacity at 25A: 155 minutes

Terminal type: Type M

Maintenance: Maintenance free

Spill protection: Completely non-spillable according to supplied product information

Mounting: Mountable in many positions according to supplied product information

Recharge characteristic: Faster recharging capability

Supplied recharge-cycle claim: Up to 3 times more recharges than a traditional marine battery

Supplied vibration-resistance claim: Up to 15 times greater than a standard flooded battery

Supplied service-life claim: Up to 3 times longer than standard flooded batteries

Length: 12.81in

Width: 6.56in

Height: 9.38in

Weight: 59.8lb

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⚠️ FITMENT CHECKLIST

Before purchasing the Optima BLUETOP D31M, confirm that the battery matches the physical, electrical and charging requirements of your boat, RV, vehicle or equipment.

• 12V electrical-system compatibility
• Model D31M suitability
• Required battery dimensions
• Available battery-compartment space
• Battery tray and hold-down arrangement
• Type M terminal compatibility
• Positive and negative terminal positions
• Battery-cable reach
• Required 900CCA starting rating
• Required 1125MCA marine cranking rating
• Required 75Ah capacity
• Required 155-minute reserve capacity
• AGM charging-system compatibility
• Engine, vessel or equipment manufacturer battery specification

⚠️ IMPORTANT: A matching physical size alone does not confirm compatibility. Terminal type, polarity, starting requirements, battery capacity, restraint and charging compatibility must also match.

⚠️ IMPORTANT: Secure the battery using an appropriate battery tray and restraint system before operating the boat, RV, vehicle or equipment.

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❓ FREQUENTLY ASKED QUESTIONS

What is the Optima BLUETOP D31M?

The D31M is a 12V AGM marine battery designed to provide strong starting performance, substantial capacity and dependable power for compatible marine and RV applications.

How many CCA does the D31M provide?

The supplied cold-cranking rating is 900CCA.

What is the MCA rating?

The supplied Marine Cranking Amps rating is 1125MCA.

What is the battery capacity?

The supplied C20 capacity is 75Ah.

What is the reserve capacity?

The supplied reserve capacity is 155 minutes at a 25A load.

Is the BLUETOP D31M AGM?

Yes. It uses Absorbent Glass Mat battery technology.

What is SpiralCell Technology?

SpiralCell is Optima’s spiral-wound internal construction using 99.99% pure lead to support strong power delivery, durability and recharge performance.

Is it maintenance free?

Yes. Routine electrolyte topping-up is not required.

Is it non-spillable?

Yes. The supplied product information describes the BLUETOP range as completely non-spillable.

Can it be mounted in different positions?

The supplied information states that it can be mounted in many positions, subject to correct installation requirements.

Is it vibration resistant?

Yes. The supplied information states up to 15 times greater vibration resistance than a standard flooded battery.

Does it recharge quickly?

Yes. Faster recharge capability is one of the supplied BLUETOP benefits.

Does it provide more recharges than a traditional marine battery?

The supplied information states up to three times more recharges than a traditional marine battery under applicable conditions.

Is it suitable for a boat?

Yes. The supplied product information specifically positions the BLUETOP range for compatible marine applications.

Is it suitable for an RV?

Yes. Compatible recreational vehicle applications are also identified in the supplied product information.

What terminal type does the D31M use?

The supplied terminal specification is Type M.

Do I need to confirm the terminal configuration?

Yes. Confirm Type M terminal compatibility, terminal position, polarity and cable reach before ordering.

How long is the D31M?

The supplied length is 12.81 inches.

How wide is it?

The supplied width is 6.56 inches.

How tall is it?

The supplied height is 9.38 inches.

How much does it weigh?

The supplied weight is 59.8lb.

Can I replace a conventional flooded marine battery with the D31M?

Potentially, but not automatically. Confirm dimensions, Type M terminal configuration, starting requirements, capacity, hold-down arrangement and AGM charging-system compatibility before changing battery technology.

How long will the 75Ah battery run my accessories?

Actual runtime depends on the electrical load, battery condition, temperature, state of charge and operating conditions. The 75Ah C20 rating alone cannot guarantee a specific runtime.

What should I check before ordering?

Confirm the D31M model requirement, 12V voltage, physical dimensions, Type M terminals, polarity, 900CCA and 1125MCA requirements, 75Ah capacity, 155-minute reserve capacity, battery restraint and AGM charging compatibility.

Does the supplied information specify package contents?

No specific package-contents list was supplied beyond the battery product itself.

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🚤 HIGH-CAPACITY AGM POWER FOR DEMANDING MARINE & RV APPLICATIONS

Choose the Optima BLUETOP D31M when you need powerful marine starting performance, substantial battery capacity and rugged AGM construction for a compatible boat, RV or mobile power application.

With 900CCA, 1125MCA, 75Ah C20 capacity, 155-minute reserve capacity, SpiralCell Technology, 99.99% pure lead and strong vibration resistance, the D31M is designed to deliver dependable power in demanding environments.

Confirm physical dimensions, Type M terminal configuration, starting requirements, reserve requirements and AGM charging-system compatibility before installation to ensure the BLUETOP D31M is correct for your application.