Key Takeaways
The 23A battery is a 12V alkaline primary cell built from eight stacked LR932 button cells, delivering roughly 30–55 mAh in a compact 10.3 mm × 28.5 mm case. It’s the standard power source for RF remotes, keyless entry fobs, and garage door transmitters, where voltage matters more than capacity.
What Is a 23A Battery?
The 23A battery is a small cylindrical primary (non-rechargeable) battery that outputs 12 volts. Depending on the manufacturer and region, it’s also labeled A23, MN21, V23GA, L1028, GP23A, 23AE, LRV08, 8LR932, or ANSI-1181A. Every one of these designations refers to the same physical battery: a 12V alkaline cell sized to fit devices that would otherwise need six or more standard AAA cells wired in series.
Engineers encounter the 23A most often in RF transmitter circuits, where the higher voltage reduces current draw for a given power output. It’s not designed for high-drain or continuous loads — its role is short, pulsed transmissions separated by long idle periods.
23A Battery Specifications and Electrical Characteristics
Before specifying a 23A, it helps to know exactly what the cell can and can’t deliver. The table below summarizes the key specifications from manufacturer datasheets.
| Parameter | Typical Value |
| Nominal voltage | 12 V |
| Chemistry | Alkaline manganese dioxide (Zn/MnO₂) |
| Capacity | ~30–57 mAh (varies by brand and cutoff voltage) |
| Diameter | 10.0–10.3 mm |
| Height/length | 28.2–28.8 mm |
| Weight | ~8 g |
| Rechargeable | No (primary cell) |
| Mercury content | Mercury-free (modern production) |
| Shelf life | Typically 3–5 years |
| Recommended load | Low current, intermittent/pulsed discharge |
Voltage, Capacity, and Discharge Characteristics
A 23A’s 12V nominal voltage comes from stacking eight individual 1.5V cells in series inside one wrapper — electrically, the pack behaves like eight AAA cells connected end to end, just far smaller. Capacity runs around 55 mAh, though it varies by manufacturer and by the discharge cutoff voltage used in testing. Because each internal wafer is tiny, the 23A only suits microamp-to-low-milliamp loads; a continuous high-current draw will collapse its voltage far faster than the mAh rating suggests, but it’s well-suited to the short current pulses typical of an RF transmit burst.
Physical Dimensions and Equivalents
The 23A measures approximately 28.5 mm long by 10.3 mm in diameter, close to an N-size cell — small enough that it’s commonly sold to fit N-size holders in prototyping and hobby projects. Vendor cross-reference lists add K23A, EL12, 8F10R, VR22, DL21, and MS21 to the equivalent part numbers above. For sourcing purposes, treat all of these as interchangeable; they share the same cell geometry, chemistry, and voltage, differing only by brand and regional naming.
Internal Structure: How a 23A Battery Is Built
What makes the 23A mechanically interesting is its internal construction: eight individual LR932 alkaline button cells, stacked and connected in series inside a single steel can, producing the 12V terminal voltage in a footprint roughly two-thirds the length of a AAA battery.
This stacked-cell design explains several practical behaviors engineers should account for:
- Voltage steps under load — a single weak cell can create a high-resistance point, causing a sharper voltage sag than in a single larger cell.
- Sensitivity to physical damage — denting the can risks shorting the stack, which is why 23A cells ship in blister packaging that isolates the terminals.
- Non-rechargeable chemistry — alkaline manganese dioxide isn’t built for charge cycling; recharging one risks venting or leakage.
- Mercury-free construction — modern 23A cells meet current environmental regulations, unlike older mercury-oxide designs.
For designers building custom holders or PCB-mount contacts, the 23A’s positive terminal is a raised button on one end, and the negative terminal is the flat can body, following standard alkaline cell polarity.
Common Applications for 23A Batteries
The A23 is ideal wherever a circuit needs more voltage headroom than a single AAA or coin cell can provide, but doesn’t need sustained current:
- Keyless entry and car alarm remotes — higher voltage extends RF range for a given antenna and driver design.
- Garage door and gate transmitters — first popularized in car alarms, now standard in garage door and keypad remotes.
- Wireless security sensors and doorbells — contacts and PIR sensors that sit idle for months, drawing current only during a brief transmission.
- Electronic locks and test equipment — battery-backed keypads, RFID readers, and instruments needing a compact 12V reference cell.
23A Battery vs. Other Miniature Alkaline Batteries
Engineers often need to decide between the 23A and its closest relatives — commonly the A27 (27A) and standard AAA cells.
| Battery | Voltage | Typical Capacity | Length × Diameter | Best For |
| 23A / A23 | 12 V | ~30–57 mAh | 28.5 × 10.3 mm | Low-duty RF remotes, fobs, alarms |
| A27 / 27A | 12 V | ~18–22 mAh | 28.2 × 8.0 mm | Smaller remotes, lower current draw |
| AAA (alkaline) | 1.5 V | ~1,000–1,200 mAh | 44.5 × 10.5 mm | General electronics, higher current |
| CR2032 (coin cell) | 3 V | ~220 mAh | 3.2 × 20 mm | RTC backup, thin form-factor devices |
A23 is shorter in diameter than A27 and suits low-current remotes; A27 offers a similar capacity class but isn’t physically interchangeable with the 23A. Unlike a single AAA or CR2032, the 23A’s series-stacked construction means it should never be treated as a drop-in replacement for higher-current applications, regardless of its voltage advantage.
How Do You Select and Source a 23A Battery for a Design Project?
When specifying a 23A, confirm the minimum operating voltage your circuit tolerates, the peak current during transmission bursts, and the expected shelf temperature range — these drive datasheet selection more than the mAh rating alone. For products shipping internationally, sourcing from a distributor with verified mercury-free, RoHS-compliant stock avoids compliance issues at customs.
LCSC stocks 12V alkaline 23A/A23-equivalent batteries alongside coin cells, AAA/AA primary cells, and the holders needed to mount them — making it straightforward to source the full power subsystem from a single supplier.
FAQ
Q: Is a 23A battery the same as an A23 battery?
Yes. There is no functional difference between 23A and A23 — both names describe the same 12V alkaline battery, with identical dimensions, internal eight-cell construction, and electrical characteristics. The difference is naming convention: “23A” is more common in North American retail packaging, while “A23” appears more often in manufacturer datasheets. Other equivalent labels on the same physical part include MN21, V23GA, L1028, GP23A, 8LR932, and LRV08. For BOM and procurement purposes, treat all of these designations as interchangeable, since they trace back to the same cell geometry and 12V alkaline chemistry regardless of which part number appears on the packaging.
Q: Can I recharge a 23A battery?
No. Standard 23A/A23 batteries use alkaline manganese dioxide (Zn/MnO₂) chemistry, formulated as a single-use primary cell rather than a rechargeable secondary cell. The internal eight-cell stack isn’t built to tolerate reverse current or charge cycling, and recharging one risks internal gas buildup, venting, leakage, or physical rupture of the can. If a design needs a rechargeable 12V-class miniature cell, look at lithium-based rechargeable alternatives instead — but expect them to differ in voltage curve, dimensions, and discharge characteristics, so they typically aren’t drop-in replacements for a socket originally sized for the 23A.
Q: What devices commonly use a 23A battery?
The 23A shows up wherever a circuit needs 12V in a small footprint with a low duty cycle: car alarm and keyless entry remotes, garage door and gate transmitters, wireless doorbells, and security sensors like door/window contacts and PIR motion detectors. It also appears in some test equipment, laser pointers, and electronic locks. What unites these applications is a shared usage pattern — long idle periods punctuated by brief, low-current RF transmission bursts — which plays directly to the 23A’s strengths in voltage headroom and shelf life rather than sustained current delivery.
Q: How long does a 23A battery last?
Unused shelf life is typically 3 to 5 years, thanks to modern mercury-free alkaline chemistry and low self-discharge rates. In-service life depends heavily on how the device uses the battery: a remote or doorbell that transmits only a few short bursts per day can run on a single 23A for a year or more, since average current draw stays extremely low. By contrast, any application that draws continuous or high current will deplete a 23A in hours or days, because its small internal cell stack can’t sustain that kind of load without a steep voltage drop.
Q: What’s the difference between a 23A and an A27 battery?
Both are 12V alkaline primary cells and are often confused because they serve similar remote-control applications, but they are not physically interchangeable. The 23A measures about 28.5 mm long by 10.3 mm in diameter, while the A27 is roughly the same length but narrower — about 8.0 mm in diameter — and generally holds less capacity. Because the diameters differ, a holder or spring contact sized for one won’t reliably seat the other. When specifying either part, confirm the exact holder dimensions against the datasheet rather than assuming the two 12V miniature cells are drop-in equivalents.
Conclusion
The 23A battery solves a specific problem: delivering 12V in a footprint too small for six series-connected AAA cells. Its eight-cell stacked construction explains both its strengths — compact size, long shelf life, mercury-free chemistry — and its limits: a low current ceiling and voltage sag under sustained load. For RF remotes, fobs, and wireless sensors with low-duty-cycle transmissions, it remains the standard choice.
Browse LCSC’s battery and battery holder selection to source 23A-equivalent cells and the mounting hardware for your next design.
