Duracell MN27 A27 12V Alkaline Battery – 1 Pack
£3.50
Out of stock
Trusted by
50,000+ patients
Free Delivery on
Over £30
UK Registered
Pharmacy
Guaranteed safe checkout
Overview
The Duracell MN27 is a 12V alkaline battery in the A27 format — a compact, cylindrical specialist battery used in a specific but important range of small electronic devices, most commonly car key fobs, remote controls for garage doors and gate systems, wireless doorbells, and similar compact remote-control applications. When the battery in your key fob or remote dies, the MN27 is frequently the replacement you need.
Duracell is the world's most recognised battery brand, built on a reputation for consistent, long-lasting performance and reliable quality control. The MN27 delivers the same Duracell standard in a specialist format — dependable power, correct voltage, and the confidence of a brand that has been trusted in this category for decades. Keeping one in the drawer for when you need it is simply sensible preparation.
What It Does
- Powers 12V small electronic devices reliably. The MN27 delivers a consistent 12V output appropriate for the compact remote-control and key fob devices it is designed for, maintaining performance through the battery's lifespan rather than dropping off rapidly as cheaper alternatives can.
- Provides long-lasting power in a compact format. Duracell's alkaline cell chemistry delivers reliable energy density appropriate for the low-drain, intermittent-use devices that typically use the A27 format.
- Replaces the battery in a wide range of key fobs and remote controls. The MN27/A27 is one of the most common specialist battery sizes for car key fobs, garage door remotes, gate openers, and wireless doorbells — if your device uses a 12V cylindrical battery in this size, the Duracell MN27 is the replacement.
How to Apply
- Identify your device's battery compartment — typically on the back or underside of the remote, key fob, or device.
- Open the battery compartment using a small flat-head screwdriver or coin if required — many key fob and remote battery compartments have a small slot for this purpose.
- Remove the old battery and note the orientation (positive + and negative − ends) before removing it, so you can insert the replacement correctly.
- Insert the Duracell MN27 in the correct orientation — match the + and − markings on the battery to those in the compartment.
- Close the battery compartment and test the device to confirm it is working.
- Dispose of the old battery responsibly — batteries must not go into general household waste. Take to a battery recycling point at a supermarket, hardware store, or local authority recycling facility.
Note: Do not mix old and new batteries. Do not mix different battery types or brands in the same device. Keep batteries out of reach of children.
Who It's For
- Anyone whose car key fob, garage door remote, gate opener, or wireless doorbell uses an A27 / MN27 12V battery — this is the primary use case for this format.
- Those who want a reliable, branded replacement battery rather than an unbranded alternative, particularly for devices where battery failure is inconvenient — a non-functioning car key fob at the wrong moment being the obvious example.
- Households and businesses that keep a stock of specialist battery sizes for essential devices — having the right battery on hand when needed avoids unnecessary trips to the shops.
- Retailers stocking a complete range of specialist battery formats alongside standard AA, AAA, and 9V cells.
Good to Know
- Check your device before purchasing. The A27 / MN27 is a specialist 12V format — confirm it matches the battery currently in your device before ordering. The battery will be labelled with its type (MN27, A27, 27A, or similar equivalents) either on the battery itself or in your device's manual.
- Long shelf life. Duracell alkaline batteries are designed for long shelf storage — keep one in a drawer for when you need it. Specific guaranteed shelf life: please verify on pack and supply manually before publishing.
- Battery recycling is mandatory in the UK. Batteries must not be placed in household general waste. Return used batteries to a designated battery collection point — available at most supermarkets, DIY stores, and recycling centres — under the UK Battery Regulations.
- Keep batteries away from children. Button and small cylindrical batteries are a serious swallowing hazard for young children. Store out of reach and dispose of immediately in a safe location after removal from devices.
- Duracell guarantee: specific guarantee terms should be verified on pack and supply manually before publishing.
Overview
The Duracell MN27 is a 12V alkaline battery in the A27 format — a compact, cylindrical specialist battery used in a specific but important range of small electronic devices, most commonly car key fobs, remote controls for garage doors and gate systems, wireless doorbells, and similar compact remote-control applications. When the battery in your key fob or remote dies, the MN27 is frequently the replacement you need.
Duracell is the world's most recognised battery brand, built on a reputation for consistent, long-lasting performance and reliable quality control. The MN27 delivers the same Duracell standard in a specialist format — dependable power, correct voltage, and the confidence of a brand that has been trusted in this category for decades. Keeping one in the drawer for when you need it is simply sensible preparation.
What It Does
- Powers 12V small electronic devices reliably. The MN27 delivers a consistent 12V output appropriate for the compact remote-control and key fob devices it is designed for, maintaining performance through the battery's lifespan rather than dropping off rapidly as cheaper alternatives can.
- Provides long-lasting power in a compact format. Duracell's alkaline cell chemistry delivers reliable energy density appropriate for the low-drain, intermittent-use devices that typically use the A27 format.
- Replaces the battery in a wide range of key fobs and remote controls. The MN27/A27 is one of the most common specialist battery sizes for car key fobs, garage door remotes, gate openers, and wireless doorbells — if your device uses a 12V cylindrical battery in this size, the Duracell MN27 is the replacement.
How to Apply
- Identify your device's battery compartment — typically on the back or underside of the remote, key fob, or device.
- Open the battery compartment using a small flat-head screwdriver or coin if required — many key fob and remote battery compartments have a small slot for this purpose.
- Remove the old battery and note the orientation (positive + and negative − ends) before removing it, so you can insert the replacement correctly.
- Insert the Duracell MN27 in the correct orientation — match the + and − markings on the battery to those in the compartment.
- Close the battery compartment and test the device to confirm it is working.
- Dispose of the old battery responsibly — batteries must not go into general household waste. Take to a battery recycling point at a supermarket, hardware store, or local authority recycling facility.
Note: Do not mix old and new batteries. Do not mix different battery types or brands in the same device. Keep batteries out of reach of children.
Who It's For
- Anyone whose car key fob, garage door remote, gate opener, or wireless doorbell uses an A27 / MN27 12V battery — this is the primary use case for this format.
- Those who want a reliable, branded replacement battery rather than an unbranded alternative, particularly for devices where battery failure is inconvenient — a non-functioning car key fob at the wrong moment being the obvious example.
- Households and businesses that keep a stock of specialist battery sizes for essential devices — having the right battery on hand when needed avoids unnecessary trips to the shops.
- Retailers stocking a complete range of specialist battery formats alongside standard AA, AAA, and 9V cells.
Good to Know
- Check your device before purchasing. The A27 / MN27 is a specialist 12V format — confirm it matches the battery currently in your device before ordering. The battery will be labelled with its type (MN27, A27, 27A, or similar equivalents) either on the battery itself or in your device's manual.
- Long shelf life. Duracell alkaline batteries are designed for long shelf storage — keep one in a drawer for when you need it. Specific guaranteed shelf life: please verify on pack and supply manually before publishing.
- Battery recycling is mandatory in the UK. Batteries must not be placed in household general waste. Return used batteries to a designated battery collection point — available at most supermarkets, DIY stores, and recycling centres — under the UK Battery Regulations.
- Keep batteries away from children. Button and small cylindrical batteries are a serious swallowing hazard for young children. Store out of reach and dispose of immediately in a safe location after removal from devices.
- Duracell guarantee: specific guarantee terms should be verified on pack and supply manually before publishing.
FAQs
What devices use the MN27 A27 12V battery?
The MN27 / A27 format is most commonly used in car key fobs and remote entry systems, garage door and gate remote controls, wireless doorbells, some small remote controls, and certain medical alert devices. If your device stopped working and you've opened the battery compartment to find a small cylindrical battery approximately 28mm long and 7.7mm in diameter, it is almost certainly an A27 or equivalent 12V format. Check the markings on the battery itself or your device manual to confirm before purchasing.
Are MN27, A27, 27A, and GP27A all the same battery?
Yes — these are all designations for the same battery format. Different manufacturers and markets use different naming conventions for the same physical specification: 12V cylindrical alkaline battery, approximately 28mm long and 7.7mm in diameter. Duracell uses the MN27 designation. Other common equivalents include A27, 27A, GP27A, L828, and EL812. If your device or its manual specifies any of these, the Duracell MN27 is the correct replacement.
How long will a Duracell MN27 last in a key fob?
Longevity in a key fob depends on how frequently the fob is used and whether it has any passive functions — such as proximity unlocking — that draw continuous low current. For a typical car key fob used several times daily, a good quality alkaline MN27 will typically last one to three years. Specific guaranteed performance data for this Duracell product: please verify on pack and supply manually before publishing.
How do I recycle my old battery?
Under UK Battery Regulations, batteries must not be disposed of in general household waste. Most supermarkets, DIY stores, and electrical retailers have free battery collection bins near the entrance or checkout — simply drop your used battery in. Local authority household waste recycling centres also accept batteries. Correct disposal ensures the metals and materials in the battery are recovered rather than sent to landfill, and is a legal requirement in the UK.
Is the Duracell MN27 the same as a standard AA or AAA battery?
No — the MN27 is a specialist 12V format, physically smaller in diameter than an AA battery and operating at a completely different voltage. Standard AA and AAA batteries operate at 1.5V each and are much larger in diameter. The MN27 is not interchangeable with any standard consumer battery format. Always check your device's battery requirement and use the specified replacement.
Why should I choose Duracell over a cheaper unbranded alternative?
For key fobs, garage door remotes, and similar devices where battery failure is genuinely inconvenient, the reliability and consistency of a branded battery from a manufacturer with robust quality control is worth the modest price difference. Cheap unbranded batteries can have highly variable performance, shorter shelf life, and less consistent voltage output — in a device as security-critical as a car key fob, that variability is an unnecessary risk. Duracell's manufacturing standards and quality consistency are among the highest in the category.