Description
The MN21 is a 12V alkaline cell in a compact cylindrical body, supplied two to a blister pack. Duracell place it in their Specialty range, the part of the line-up that covers the awkward sizes rather than the AA and AAA cells most kitchen drawers are full of. The number that matters here is the voltage: 12V from one small cell, where a standard alkaline round cell gives 1.5V. That is what suits it to equipment needing a brief, firm pulse of current rather than hours of steady draw.
You will most often meet this size in car key fobs and alarm remotes, garage and gate openers, wireless doorbells, and the small sensors used with home alarm systems. Before you order, check the old cell rather than the device manual: the codes printed on this pack are A23, 23A, V23GA, LRV08 and 8LR932, and every one of them names the same cell. Manufacturers pick whichever code suits them, so a remote that asks for an A23 or a V23GA takes exactly what is in this pack. If the cell you removed carries none of those markings, it is a different size and this is not the replacement.
Each blister holds two cells, so a household with two remotes is covered in one purchase. The pack carries a keep out of reach of children warning, worth taking seriously with cells this small. Duracell print no shelf life figure on this pack, so we quote none. The listing is sold as one pack of two cells with a minimum order of ten packs, twenty cells in all, which suits an installer, a workshop or a shop counter more than a one-off replacement. It sits alongside our wider Duracell range of alkaline, lithium coin and silver oxide cells.
Specification
| Size |
MN21 |
| Chemistry |
Alkaline |
| Voltage |
12V |
| Codes |
A23, 23A, V23GA, LRV08, 8LR932 |
| Pack quantity |
2 cells |
| Sold as |
Pack of 2 cells |
| Minimum order |
10, sold in multiples of 10 |
Frequently Asked
Is the MN21 the same battery as an A23?
Yes. A23, 23A, V23GA, LRV08 and 8LR932 all name this same 12V cell; manufacturers simply print whichever code they prefer.
How much voltage does one cell give?
A single MN21 gives 12V, eight times the 1.5V of an ordinary round alkaline cell, so your device needs only one of them.
How many cells do I actually receive?
Each blister pack holds two MN21 cells. The minimum order on this listing is ten packs, which works out at twenty cells in total.
What kind of devices take this size?
Car key fobs, garage and gate remotes, wireless doorbells and small alarm sensors and contacts are the usual homes for a 12V MN21.
Can I fit one in place of a 9V PP3 battery?
No. A PP3 is a different size, shape and voltage, with snap terminals rather than end contacts. Only fit a cell whose code matches the one you removed.