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A23 vs A27
A23 and A27 are not interchangeable. They differ in diameter (10.3 mm vs 8 mm), length (28.5 mm vs 28.2 mm). The A23 holds about 2.5× the energy of the A27 (50 mAh vs 20 mAh).
| A23 | A27 | |
|---|---|---|
| Type | high-voltage alkaline battery | high-voltage alkaline battery |
| Voltage | 12 V | 12 V |
| Size | 10.3 mm × 28.5 mm | 8 mm × 28.2 mm |
| Typical capacity | ≈ 50 mAh | ≈ 20 mAh |
| Rechargeable | no | no |
| Other codes | 23A, MN21, 8LR932, V23GA | 27A, MN27, 8LR732, V27GA |
Can I use A27 instead of A23?
No. Different width: 8 mm vs 10.3 mm.
Can I use A23 instead of A27?
No. Different width: 10.3 mm vs 8 mm.
Where each one is used
A23: older garage door opener remotes; car alarm and keyless-entry remotes; wireless doorbells.
A27: car alarm remotes; garage door and gate remotes; wireless doorbells.
Both sizes turn up in car alarm remotes, depending on the model, which is why people mix them up: check the code on the old cell.