Duracell Specialty Electronics MN21, Pack of 2

Reliable 12V Power for Specialty Electronics

The Duracell Specialty MN21 is a compact alkaline battery specifically designed for electronic devices requiring a 12V power source.

Despite its small cylindrical dimensions, the MN21 delivers considerably higher voltage than conventional AA or AAA batteries, making it suitable for specialist wireless and remote-control equipment.

Duracell uses proven Alkaline Manganese Dioxide – Zn/MnO₂ technology to provide reliable performance and stable voltage throughout much of the battery’s operating life.

MN21 / A23 / 23A – One Battery, Multiple Designations

The Duracell MN21 can appear under several different battery references depending on the equipment manufacturer.

Common equivalent designations include:

MN21 / A23 / 23A / 8LR932 / V23GA / MS21 / L1028F / LRV08

This makes it important to check both the battery already installed in the device and the manufacturer’s specifications before choosing a replacement.

If your equipment specifies one of these compatible references, the Duracell MN21 may be the correct replacement battery.

Ideal for Yacht & Boat Electronics

Modern yachts contain many small wireless devices and remote-control systems that rely on specialty batteries.

The Duracell MN21 is suitable for compatible equipment such as:

• Yacht and vehicle key fobs
• Remote controls
• Wireless remote-control systems
• Alarm remote controls
• Security systems
• GPS trackers
• Door and gate remote controls
• Wireless switches
• Small electronic accessories
• Compact flashlights
• Other equipment requiring an A23 / MN21 12V battery

Keeping spare specialty batteries onboard is particularly useful because these battery formats may not be as readily interchangeable as common AA or AAA batteries.

Always verify the exact battery type specified by the equipment manufacturer.

Powerful 12V Output in a Compact Format

One of the main advantages of the MN21 battery is its high voltage relative to its physical size.

Each battery provides:

Nominal Voltage: 12V

This makes it particularly suitable for compact remote-control transmitters and wireless electronics where a higher operating voltage is required without using a large battery pack.

The MN21 offers a typical nominal capacity of approximately:

60mAh

under Duracell’s specified test conditions.

Alkaline Manganese Dioxide Technology

The Duracell MN21 uses:

Alkaline Manganese Dioxide – Zn/MnO₂

This proven chemistry offers several useful characteristics for specialty electronic devices:

• Reliable power delivery
• Stable voltage through much of the operating life
• Low self-discharge
• Long operating life
• Excellent resistance to corrosion
• Wide operating temperature capability

These characteristics make it a dependable solution for electronics that may only be activated occasionally but must operate correctly when needed.

Guaranteed for 5 Years in Storage

Duracell guarantees its Specialty MN21 batteries for:

5 years in storage

This makes the MN21 particularly suitable for keeping as a spare battery onboard.

A replacement pair can be stored in:

• Yacht spare-parts lockers
• Electronics cabinets
• Navigation areas
• Crew storage
• Toolboxes
• Emergency battery kits

so that a fresh battery is available when a remote control, key fob or other electronic accessory requires replacement.

Wide Operating Temperature Range

According to Duracell technical data, the MN21 is designed to operate across a broad temperature range:

Operating Temperature: approximately -10°C to +60°C

Recommended storage conditions are approximately:

5°C to 30°C

This provides useful flexibility for many different applications, provided that the electronic device itself is also rated for the environmental conditions.

Compact & Lightweight Design

The MN21 provides its 12V output in a very compact cylindrical package.

Typical battery weight is approximately:

7.95g

Its small dimensions and low weight make it ideal for portable electronics, remote controls and wireless transmitters where space is limited.

The compact 2-pack is also easy to store onboard without taking up valuable space.

Practical Pack of 2

The package contains:

2 × Duracell Specialty MN21 12V Batteries

The 2-pack allows one battery to be installed while keeping another available as a spare.

This makes it a practical choice for:

• Yacht electronics supplies
• Spare-parts inventories
• Emergency battery kits
• Engineering stores
• Crew equipment
• Vehicle accessories
• Home and office electronics

Why Choose Duracell Specialty MN21?

Small remote-control and security devices may depend completely on a single specialty battery.

The Duracell MN21 combines 12V output, reliable alkaline technology, low self-discharge and a 5-year storage guarantee in a compact format.

For yacht owners, captains and crew, having spare MN21 / A23 batteries onboard can prevent a small discharged battery from making a useful remote control, alarm accessory or wireless device unusable.

Key Benefits

• Trusted Duracell quality
• Specialty alkaline battery
• High 12V nominal voltage
• Standard MN21 / A23 format
• Also known as 23A / 8LR932
• Approx. 60mAh nominal capacity
• Stable voltage performance
• Low self-discharge
• Excellent resistance to corrosion
• Wide operating temperature range
• 5-year storage guarantee
• Compact and lightweight
• Ideal for key fobs and remote controls
• Suitable for alarm and security equipment
• Suitable for GPS trackers and wireless electronics
• Useful spare battery for yacht equipment
• Convenient pack of 2

Technical Specifications

Brand: Duracell
Range: Specialty Electronics / Specialty Alkaline
Battery Type: Specialty Alkaline Battery
Model: MN21
IEC Designation: 8LR932
Common Equivalent: A23 / 23A
Other Equivalents: V23GA, MS21, L1028F, LRV08
Chemistry: Alkaline Manganese Dioxide – Zn/MnO₂
Nominal Voltage: 12V
Nominal Capacity: Approx. 60mAh
Typical Weight: Approx. 7.95g
Typical Volume: Approx. 2.3cm³
Operating Temperature: Approx. -10°C to +60°C
Recommended Storage Temperature: Approx. 5°C to 30°C
Rechargeable: No
Storage Guarantee: 5 years
Packaging: Card / Blister
Quantity: 2 batteries

Recommended Applications

Suitable for compatible:

• Key fobs
• Remote controls
• Alarm remote controls
• Car alarm systems
• Security equipment
• GPS trackers
• Wireless controllers
• Door and gate remote controls
• Wireless switches
• Compact flashlights
• Small electronic devices
• Yacht electronics
• Boat accessories requiring MN21 / A23 batteries

Important Compatibility Information

The MN21 is a 12V specialty battery and should not be confused with conventional 1.5V cylindrical batteries that may look similar.

Before installation, always verify that the equipment specifically requires:

MN21 / A23 / 23A / 8LR932 or another confirmed equivalent.

Using the wrong voltage or battery type can prevent the device from operating correctly and may damage sensitive electronics.

Storage & Safety

For safe and reliable use:

• Install the battery according to the correct polarity.
• Do not attempt to recharge MN21 alkaline batteries.
• Do not short-circuit the terminals.
• Do not expose batteries to fire or excessive heat.
• Do not mix old and new batteries in equipment using multiple cells.
• Remove exhausted batteries promptly.
• Store spare batteries in their original packaging.
• Keep batteries in a cool, dry location.
• Keep batteries away from children.
• Recycle used batteries at an appropriate battery collection point.