Battery

A23

12V alkaline cell

A23 is a compact 12-volt alkaline cell (also sold as 23A / MN21). Match the tray or accessory part number — Genie GIT-1 and some Hampton Bay fan remotes use A23, while many LiftMaster / Chamberlain remotes use CR2032, CR2016, AAA or 9V instead. Not a phone battery.

Chemistry: alkaline
Voltage: 12 V
Diameter: —
Length: —
Used by: 2 devices

Common uses: Garage remotes · Ceiling fan remotes · Key fobs · Doorbell transmitters

A23 Diagram

Brand-neutral outline — confirm the tray in your device.

Other names

Genuine aliases and pack labels for this battery — not substitutes of a different chemistry.

MN21 · 23A · 8LR932

Related codes

Same battery / other names

A23MN21

Also sold as

Brand or pack name for the same battery.

A238LR932

Same battery

Same battery, different label.

Devices using A23

All (2)Ceiling fan remotes (1)Garage remotes (1)

Used in

Ceiling fan remotes1 device Garage remotes1 device

Learn more

Testers & chargers

Optional tools that fit this cell type — only where the chemistry allows. Separate from the battery answer.

Amazon links may earn us a commission. They do not change the battery answer.

Battery tester
Quick good / low / dead check for household cells
Crude check only — does not measure capacity under realistic load.
How to test a battery Buy on Amazon
Battery storage / organiser
Keep spare cells sorted and prevent coin-cell shorts
Keep coin cells away from children.
Buy on Amazon

Buy links are optional and separate from the battery answer.

Need one?

Need a A23?

Search Amazon for packs of this battery code.

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Notes

12V miniature alkaline (23A / MN21). Not Samsung Galaxy A23. Many LiftMaster/Chamberlain remotes use CR2032/CR2016/AAA/9V instead — match accessory model.