12V 40Ah Deep Cycle AGM Battery (DC40-12)

🔋 FULLRIVER DC40-12 DEEP CYCLE AGM BATTERY

12V 40Ah Deep Cycle AGM Battery – 275CCA, M6 Terminals & Strong Reserve Capacity

⚡ Heavy-duty deep cycle power with reliable cranking support, strong reserve capacity and maintenance-free AGM construction.

The Fullriver DC40-12 is a premium 12V 40Ah Deep Cycle AGM battery engineered for demanding cyclic, standby and auxiliary power applications where durability, stored energy and consistent performance matter.

Part of Fullriver’s trusted DC Series, the DC40-12 uses robust internal construction, heavier plates and increased lead content to support repeated cycling, strong reserve capacity and long service life.

With 40Ah capacity, 275CCA starting support, 320A CA / MCA and reserve capacity ratings of 53 minutes at 25A and 9 minutes at 75A, the DC40-12 is a versatile option for compatible marine, caravan, RV, golf car, floor-cleaning, backup, solar and auxiliary power systems.

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⚡ KEY FEATURES

🔋 12V Deep Cycle AGM Performance
Designed for dependable cyclic, standby and auxiliary power applications requiring reliable 12V energy storage.

⚡ 40Ah Capacity at 20HR Rate
Provides substantial stored energy for compatible equipment, battery banks and auxiliary electrical systems.

🚗 275CCA Starting Support
Provides useful cranking capability for compatible equipment requiring both deep cycle performance and engine-starting current.

⚡ 320A CA / MCA
Delivers additional cranking capability for compatible equipment and marine applications.

⏱️ 53-Minute Reserve Capacity at 25A
Provides strong reserve-energy performance for compatible 12V loads.

💥 9-Minute Reserve Capacity at 75A
Demonstrates useful stored-energy capability even under significantly heavier discharge loads.

🔁 Built for Repeated Cycling
Fullriver DC Series construction uses heavier plates and increased lead content to support reserve capacity and long cycle life.

🔒 Sealed AGM Construction
Absorbed Glass Mat technology provides clean, dependable and non-spillable operation under normal conditions.

🛠️ Maintenance-Free Design
No routine electrolyte top-ups are required under normal operating conditions.

🧯 Flame-Resistant ABS Case
Durable ABS plastic housing with a UL94-HB flame-resistance rating.

🔌 M6 Terminal Connections
Provides secure electrical connections for compatible auxiliary, cyclic and starting systems.

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🔋 DEPENDABLE DEEP CYCLE PERFORMANCE

The Fullriver DC40-12 is designed primarily for applications where the battery is regularly discharged and recharged during normal operation.

Its 40Ah capacity at the 20-hour rate provides dependable stored energy for equipment, auxiliary systems, backup installations and other compatible cyclic applications.

Unlike a conventional starting battery designed mainly for short bursts of high current, the DC40-12 is built to provide sustained energy delivery while still offering useful cranking support where required.

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🚗 DEEP CYCLE POWER WITH CRANKING SUPPORT

In addition to its deep cycle capability, the DC40-12 provides 275CCA and 320A CA / MCA.

This gives the battery useful short-duration starting capability for compatible equipment requiring both stored energy and cranking performance.

⚠️ IMPORTANT: The DC40-12 is primarily a deep cycle AGM battery. Confirm the required cranking specification before selecting it for an engine-starting application.

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🔒 SEALED AGM TECHNOLOGY

The DC40-12 uses Absorbed Glass Mat technology to retain electrolyte within the internal battery structure.

This sealed design provides maintenance-free operation and eliminates routine fluid top-ups under normal operating conditions.

Its non-spillable construction makes it a practical option for compatible mobile, marine, standby and auxiliary installations.

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💪 FULLRIVER DC SERIES CONSTRUCTION

The DC40-12 forms part of Fullriver’s DC Series of deep cycle AGM batteries.

The series uses heavier plates, increased lead content and carefully engineered internal components to support dependable cycling performance, reserve capacity and service life.

This robust construction makes the DC40-12 suitable for demanding applications where reliable repeated energy delivery is required.

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⏱️ STRONG RESERVE CAPACITY

The DC40-12 provides useful reserve-energy performance at multiple discharge loads.

• Reserve capacity at 25A: 53 minutes
• Reserve capacity at 75A: 9 minutes

These ratings provide an additional indication of the battery’s stored-energy capability alongside its amp-hour capacity.

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📊 MULTIPLE CAPACITY RATINGS

The DC40-12 provides different capacity ratings depending on the discharge rate.

• Capacity at 5HR rate: 32.8Ah
• Capacity at 20HR rate: 40.0Ah
• Capacity at 72HR rate: 42.0Ah
• Capacity at 100HR rate: 44.0Ah

These ratings help indicate expected battery capacity across different load and discharge conditions.

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⚡ LOW INTERNAL RESISTANCE

The DC40-12 has an internal resistance of approximately 7.00mΩ.

Low internal resistance supports efficient energy transfer and helps the battery deliver current effectively under compatible cyclic and short-duration cranking loads.

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🔧 SUITABLE APPLICATIONS

• Boat and marine auxiliary power systems
• Caravans and RV electrical systems
• Golf car auxiliary applications
• Floor cleaning machines
• Backup and standby power systems
• Deep cycle battery banks
• 12V auxiliary power systems
• Solar power systems
• Off-grid power installations
• Compatible cyclic equipment
• Applications requiring moderate cranking support

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📐 PRODUCT SPECIFICATIONS

Brand: Fullriver

Model: DC40-12

Series: DC Series

Battery type: Deep Cycle AGM

Nominal voltage: 12V

Capacity at 5HR rate: 32.8Ah

Capacity at 20HR rate: 40.0Ah

Capacity at 72HR rate: 42.0Ah

Capacity at 100HR rate: 44.0Ah

Cold Cranking Amps: 275A CCA

Cranking Amps / Marine Cranking Amps: 320A CA / MCA

Reserve capacity at 25A: 53 minutes

Reserve capacity at 75A: 9 minutes

Internal resistance: 7.00mΩ

Group size: N/A

Case material: ABS plastic

Flame-resistance rating: UL94-HB

Terminal type: M6

Weight: Approximately 13.6kg

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📏 DIMENSIONS

Length: 198mm

Width: 166mm

Height: 174mm

Height including terminals: 174mm

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📦 WHAT’S INCLUDED?

• 1 × Fullriver DC40-12 12V 40Ah Deep Cycle AGM Battery

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⚠️ FITMENT & COMPATIBILITY INFORMATION

Please confirm the electrical, physical and charging requirements of your equipment before purchasing.

Check the required:

• Battery voltage – 12V
• Battery chemistry – AGM
• Battery capacity
• Physical dimensions
• Terminal type – M6
• Terminal orientation and polarity
• Charging profile
• Cranking-current requirement where applicable
• Available installation space
• Cyclic, standby or auxiliary application requirements

⚠️ IMPORTANT: Do not purchase based on capacity or dimensions alone. Terminal configuration, charging requirements, cranking needs and application suitability must also match your equipment.

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❓ FREQUENTLY ASKED QUESTIONS

What type of battery is the Fullriver DC40-12?

The DC40-12 is a sealed 12V Deep Cycle AGM battery from Fullriver’s DC Series.

What is the battery capacity?

The battery is rated at 40.0Ah at the 20-hour discharge rate.

What are the other capacity ratings?

The supplied specifications list 32.8Ah at the 5-hour rate, 40.0Ah at the 20-hour rate, 42.0Ah at the 72-hour rate and 44.0Ah at the 100-hour rate.

Is the DC40-12 a deep cycle battery?

Yes. It is designed primarily for compatible cyclic, standby and auxiliary deep cycle applications.

Does the DC40-12 have a CCA rating?

Yes. The battery is rated at 275CCA.

What is the CA / MCA rating?

The supplied Cranking Amps / Marine Cranking Amps rating is 320A.

Can the DC40-12 be used for engine starting?

The battery provides 275CCA of starting capability, but it is primarily designed as a deep cycle AGM battery. Confirm that its cranking output meets the specific requirements of your engine or equipment before use.

What is the reserve capacity?

The DC40-12 provides approximately 53 minutes of reserve capacity at a 25A load and approximately 9 minutes at a 75A load.

Is the battery maintenance-free?

Yes. Its sealed AGM construction means routine electrolyte top-ups are not required under normal operating conditions.

Is the DC40-12 non-spillable?

Yes. Its sealed AGM construction is designed to provide non-spillable operation under normal conditions.

Can the DC40-12 be used in a caravan or RV?

Yes, where the system requires a compatible 12V AGM deep cycle battery with matching capacity, dimensions, M6 terminals and charging profile.

Is the DC40-12 suitable for marine applications?

It may be suitable for compatible marine auxiliary and cyclic power applications where its voltage, capacity, terminal configuration and charging requirements match the system.

Can it be used in golf car applications?

It may be suitable for compatible golf car auxiliary applications requiring a 12V AGM battery with the correct capacity, dimensions, terminals and charging requirements.

Can the DC40-12 be used in a floor cleaning machine?

Yes, where the machine requires a compatible 12V AGM deep cycle battery with matching physical and electrical specifications.

Can this battery be used for solar or off-grid power?

Yes. It may be suitable for compatible solar and off-grid systems designed around a 12V AGM battery and appropriate charging equipment.

Can multiple DC40-12 batteries be used together?

Multiple batteries may be used in a correctly designed battery bank where the system, charger and wiring are configured appropriately. Batteries used together should be suitably matched and installed according to the equipment and battery-system requirements.

What terminals does the DC40-12 use?

The battery uses M6 terminals.

What are the battery dimensions?

The DC40-12 measures approximately 198mm long, 166mm wide and 174mm high including the terminals.

How much does the battery weigh?

The DC40-12 weighs approximately 13.6kg.

What is the internal resistance?

The supplied internal resistance specification is approximately 7.00mΩ.

Is the battery case flame resistant?

Yes. The ABS plastic case has a supplied UL94-HB flame-resistance rating.

Do I need an AGM-compatible charger?

Use charging equipment suitable for sealed AGM battery chemistry and configured to the battery manufacturer’s recommended charging requirements.

How do I know if the DC40-12 will replace my existing battery?

Compare the required voltage, AGM chemistry, capacity, physical dimensions, M6 terminal configuration, charging profile and any cranking requirements with your existing battery and equipment specifications before purchase.

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🔋 HEAVY-DUTY DEEP CYCLE POWER WITH STRONG RESERVE CAPACITY

Choose the Fullriver DC40-12 when you need dependable cycling performance, useful cranking support and maintenance-free AGM power for a demanding 12V system.

With 40Ah capacity, 275CCA starting support, 320A CA / MCA, 53-minute reserve capacity at 25A and robust Fullriver DC Series construction, the DC40-12 is a versatile choice for compatible marine, caravan, golf car, equipment, backup, solar and auxiliary power applications.

Power your 12V system with dependable Fullriver deep cycle AGM performance.