A21 Battery (also known as 8LR23 or ANSI-1181A) is a dry cell-type battery mainly used in small electronic key fob radio devices, such as keyless vehicle entry systems, home security systems, garage door openers, and Bluetooth headsets. A21 Battery is cylindrical, smaller than an AAA battery, measuring only 28.9 mm long and 10.3 mm in diameter, with a typical weight of 8 grams; however, this battery must not be confused with a similar single-cell N battery.
A21 Battery is an 8-cell device with a nominal voltage of 12 V. The higher voltage is necessary for the radio frequency-transmitting and receiving devices which this battery often power. It has a capacity of around 55 mAh.
A21 Battery cross reference to the following battery:
- Energizer: A23
- Duracell: MN21
- VARTA: V23GA
- EVEREADY: A23
- NEDA: 1811A
- IEC: 3LR50
- Panasonic: LR-V08
- ELPA: SES-23A
A21 Battery is compatible with the following models:
K23A, 1811A, 8F10R, L1028 Alkaline, BAT012, 8LR32, V23GA, EL12 Alkaline, MS21, MN21, Innotek BAT012, 23GA, N21 Alkaline, V23GA Alkaline, LR23A, A23BP, L1028, BAT-012 Innotek, A23 Alkaline, BAT-012,