GP 23A 12V High-Voltage Alkaline Battery for Remote Controls and Wireless Doorbells
| Component | Specification |
| Brand | GP Batteries |
| Chemistry | Alkaline (Manganese Dioxide) |
| Model | 23A / L1028 / MN21 / MS21 |
| Nominal Voltage | 12.0V |
| Capacity | ~55mAh |
| Terminal Type | Button Top |
| Shelf Life | Up to 3 Years |