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Duracell Alarm Battery Pack 2 MN21 Battery, 12V A23 Alkaline, Remote Control Battery, Car Alarm Battery, Key Fob Battery Replacement

Name: Duracell Alarm Battery Pack 2 MN21 Battery, 12V A23 Alkaline, Remote Control Battery, Car Alarm Battery, Key Fob Battery Replacement
Brand: Duracell
SKU: STX-805526
Price: 3.38 GBP
Availability: InStock

Brand Duracell See the full Duracell range

SKU STX-805526

Product code: SX805526
Manufacturer part number: MN21
EAN: 5000394203969

£3.38

inc VAT£2.82 ex VAT

Lead time: 2-10 working days

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Description

Product Overview

The Duracell Alarm Battery Pack 2 is a reliable MN21 (A23) 12V alkaline battery designed for devices that need a compact, high-voltage power source. Ideal for alarms, key fobs and remote controls, it helps deliver dependable performance when you need it most. A great choice for quick replacement to keep security and convenience devices working smoothly.

Key Features

12V alkaline power – provides consistent energy for compatible alarm and remote devices.
MN21 (A23) compatibility – suitable for many key fobs, car alarm remotes and wireless controls.
Duracell quality – designed for dependable performance to reduce unexpected power loss.
Compact battery format – fits small devices where space is limited without compromising on output.

Use Case / Application

Designed for everyday security and convenience electronics where a 12V A23 battery is specified. Common uses include:

Car key fobs and keyless entry remotes
Car alarm remotes and security fobs
Remote controls for compatible devices
Wireless doorbells and small alarm systems

Suitable for home, office and vehicle use, especially where reliable power is essential for safety and access.

Problem → Solution

Perfect for replacing a flat key fob or alarm battery, restoring reliable power so your remote devices work when you need them.

Product Specifications

• Manufacturer – Duracell
• Manufacturer Part Number (MPN) – MN21
• EAN / Barcode – 5000394203969
• Product Type – Alarm battery / A23 battery / MN21 12V alkaline battery
• Typical Applications / Use Cases – Key fobs, car alarm remotes, remote controls, wireless doorbells and compatible alarm systems
• Technical Specifications – 12V alkaline battery, A23 (MN21) format

Why Buy from BHL

Duracell is a trusted manufacturer known for reliable everyday power solutions, including specialist batteries for alarms and remote controls. Buy the Duracell Alarm Battery Pack 2 MN21 online from BHL for competitive pricing and genuine parts where relevant. We are a specialist online merchant, trusted by thousands of satisfied customers online since 1998 with thousands of 5 star reviews. Enjoy free* and fast UK delivery, dispatched with care from UK warehouses.
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Reviews

Buying guide: Batteries

Batteries power remote controls, torches, clocks, toys, car keys and many other everyday devices. This category covers standard cylindrical sizes, 9V batteries, lithium coin cells, alkaline and silver oxide button cells, and power banks for charging phones and other USB devices on the move.

Sizes and types

AA, AAA, C and D: alkaline cells with a nominal 1.5V. Packs often also show the international code, such as LR6 for AA, LR14 for C and LR20 for D.
9V (PP3): rectangular batteries, sold singly or in packs.
Lithium coin cells: flat 3V cells with codes such as CR2032, CR1620 or CR1220; the code identifies the size.
Button cells: small alkaline and silver oxide cells of about 1.5V, with codes such as LR44.
Power banks: rechargeable packs rated in mAh; a higher figure stores more charge.

Match the size code and voltage printed on the old battery or given in the device's instructions.

Button and coin battery safety

A swallowed coin or button battery can cause serious internal chemical burns within about two hours. Keep spare and used batteries out of children's reach, check that battery covers on devices are secure, and seek urgent medical help straight away if you think a child has swallowed one.

Recycling

Do not put batteries in the household bin; they carry a crossed-out wheelie bin symbol for that reason. Lithium-ion batteries can catch fire if they are thrown in a bin, especially if they are damaged or get wet. Take used portable batteries to a battery drop-off point, which many larger shops that sell batteries have, and tape over the terminals first.

For smoke and carbon monoxide alarms, see alarms, detectors and testers, or browse lighting.

Shop all Batteries