{"id":4495,"date":"2026-07-17T06:59:12","date_gmt":"2026-07-17T06:59:12","guid":{"rendered":"https:\/\/blogs.lcsc.com\/blog\/?p=4495"},"modified":"2026-07-17T06:59:23","modified_gmt":"2026-07-17T06:59:23","slug":"23a-battery-specifications-structure-uses","status":"publish","type":"post","link":"https:\/\/blogs.lcsc.com\/blog\/23a-battery-specifications-structure-uses\/","title":{"rendered":"An Engineer\u2019s Guide to 23A Battery: Specifications, Internal Structure, and Common Uses"},"content":{"rendered":"

Key Takeaways<\/span><\/b><\/h2>\n

The 23A battery is a 12V alkaline primary cell built from eight stacked LR932 button cells, delivering roughly 30\u201355 mAh in a compact 10.3 mm \u00d7 28.5 mm case. <\/span>It\u2019s the standard power source for RF remotes, keyless entry fobs, and garage door transmitters, where voltage matters more than capacity.<\/span><\/p>\n

What Is a 23A Battery?<\/span><\/b><\/h2>\n

The 23A battery is a small cylindrical primary (non-rechargeable) battery that outputs 12 volts. Depending on the manufacturer and region, it\u2019s 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.<\/span><\/p>\n

Engineers encounter the 23A most often in RF transmitter circuits, where the higher voltage reduces current draw for a given power output. It\u2019s not designed for high-drain or continuous loads \u2014 its role is short, pulsed transmissions separated by long idle periods.<\/span><\/p>\n

23A Battery Specifications and Electrical Characteristics<\/span><\/b><\/h2>\n

Before specifying a 23A, it helps to know exactly what the cell can and can\u2019t deliver. The table below summarizes the key specifications from manufacturer datasheets.<\/span><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/span><\/b><\/td>\nTypical Value<\/span><\/b><\/td>\n<\/tr>\n
Nominal voltage<\/span><\/td>\n12 V<\/span><\/td>\n<\/tr>\n
Chemistry<\/span><\/td>\nAlkaline manganese dioxide (Zn\/MnO\u2082)<\/span><\/td>\n<\/tr>\n
Capacity<\/span><\/td>\n~30\u201357 mAh (varies by brand and cutoff voltage)<\/span><\/td>\n<\/tr>\n
Diameter<\/span><\/td>\n10.0\u201310.3 mm<\/span><\/td>\n<\/tr>\n
Height\/length<\/span><\/td>\n28.2\u201328.8 mm<\/span><\/td>\n<\/tr>\n
Weight<\/span><\/td>\n~8 g<\/span><\/td>\n<\/tr>\n
Rechargeable<\/span><\/td>\nNo (primary cell)<\/span><\/td>\n<\/tr>\n
Mercury content<\/span><\/td>\nMercury-free (modern production)<\/span><\/td>\n<\/tr>\n
Shelf life<\/span><\/td>\nTypically 3\u20135 years<\/span><\/td>\n<\/tr>\n
Recommended load<\/span><\/td>\nLow current, intermittent\/pulsed discharge<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Voltage, Capacity, and Discharge Characteristics<\/span><\/b><\/h3>\n

A 23A\u2019s 12V nominal voltage comes from stacking eight individual 1.5V cells in series inside one wrapper \u2014 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\u2019s well-suited to the short current pulses typical of an RF transmit burst.<\/span><\/p>\n

Physical Dimensions and Equivalents<\/span><\/b><\/h3>\n

The 23A measures approximately 28.5 mm long by 10.3 mm in diameter, close to an N-size cell \u2014 small enough that it\u2019s 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.<\/span><\/p>\n

Internal Structure: How a 23A Battery Is Built<\/span><\/b><\/h2>\n

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.<\/span><\/p>\n

This stacked-cell design explains several practical behaviors engineers should account for:<\/span><\/p>\n

    \n
  1. Voltage steps under load<\/span><\/b> \u2014 a single weak cell can create a high-resistance point, causing a sharper voltage sag than in a single larger cell.<\/span><\/li>\n
  2. Sensitivity to physical damage<\/span><\/b> \u2014 denting the can risks shorting the stack, which is why 23A cells ship in blister packaging that isolates the terminals.<\/span><\/li>\n
  3. Non-rechargeable chemistry<\/span><\/b> \u2014 alkaline manganese dioxide isn\u2019t built for charge cycling; recharging one risks venting or leakage.<\/span><\/li>\n
  4. Mercury-free construction<\/span><\/b> \u2014 modern 23A cells meet current environmental regulations, unlike older mercury-oxide designs.<\/span><\/li>\n<\/ol>\n

    For designers building custom holders or PCB-mount contacts, the 23A\u2019s positive terminal is a raised button on one end, and the negative terminal is the flat can body, following standard alkaline cell polarity.<\/span><\/p>\n

    Common Applications for 23A Batteries<\/span><\/b><\/h2>\n

    The A23 is ideal wherever a circuit<\/a> needs more voltage headroom than a single AAA or coin cell can provide, but doesn\u2019t need sustained current:<\/span><\/p>\n