Energizer A23 Batteries

Energizer A23 Batteries

Energizer A23 is a 12V alkaline battery made for compact electronics that need short, high-voltage bursts. Typical uses include wireless doorbells, garage-door remotes, car keyless entry fobs, Bluetooth trackers, and security sensors. Choose it when your device specifically calls for A23/23A/MN21.

When to Choose Energizer A23

• Use if your device label or manual specifies A23 (aka 23A, MN21, V23GA, 8LR932).
• Good for intermittent, low-to-moderate drain devices that need 12V in a small form factor.
• Avoid if your device requires A27 or a coin cell (e.g., CR2032) — they are not interchangeable.

Compatibility and Cross-References

Equivalent designations you may see on packaging or in manuals:

• 23A, A23, MN21
• V23GA, E23A
• 8LR932 (IEC)

Key Specs

Attribute	Details
Chemistry	Alkaline
Nominal Voltage	12V
Size	A23 (miniature cylindrical)
Dimensions	10.3 mm diameter x 28.5 mm length
Shelf Life	Up to 3 years (stored in original packaging, cool/dry conditions)
Mercury Content	None (mercury-free)

Real-World Performance

• Car key fobs and remotes: often 6–18 months, depending on use and signal strength.
• Wireless doorbells/sensors: typically several months to a year with normal use.
• Cold or very hot environments, frequent button presses, and poor RF reception reduce runtime.

Buying Options

• Single or 2-pack: quick replacements for one or two devices.
• 4–8 pack: cost-effective for households with several remotes/sensors.
• Bulk cases (e.g., 24/48/96): for facilities, property managers, service teams, or resale.

Replacement Checklist

1. Confirm part: your device should list A23/23A/MN21 (do not substitute A27).
2. Open the battery compartment and note polarity (+/–).
3. Clean contacts with a dry cloth if corroded or dusty.
4. Insert the new A23, matching polarity, and test the device.
5. If performance is weak, verify orientation and consider re-pairing the remote/fob.

Storage and Safety

• Store in original packaging, in a cool, dry place. Avoid extreme heat or humidity.
• Do not recharge, disassemble, or short-circuit alkaline batteries.
• Do not mix old and new batteries or different brands in the same device.
• Keep out of reach of children and pets; seek medical help immediately if swallowed.
• Recycle or dispose of used batteries according to local regulations.

FAQs

Is A23 the same as 23A or MN21?

Yes. A23, 23A, MN21, V23GA, and 8LR932 are common cross-references for the same 12V battery size. Check your device to confirm.

Can I replace an A23 with an A27?

No. Both are 12V but differ in size and capacity. Use only the type specified by your device.

How can I tell if my A23 is depleted?

Devices may show reduced range or intermittent operation. With a multimeter, a fresh A23 typically reads around 12V; substantially lower voltage indicates it’s time to replace.

Are Energizer A23 batteries rechargeable?

No. They are primary (single-use) alkaline batteries.

How long can I store spares?

Up to 3 years under proper storage (cool, dry, unopened packaging). Label the purchase date and rotate stock.