ALKALINE BATTERY
BLR122 round
replaces old square version
VOLTAGE: 22.5V
Height: 50.8 mm. Width: 12 Length: 12 mm.
The battery supplied may vary in colour and make.
The A412 (or Eveready 412) is a alkaline replacement for the once popular carbon zinc battery that was commonly used in AVO meters and in vintage Knight transistor testers. The A412 (or Eveready 412) cells produce 22.5 Volts and has contacts on each end. It is widely used in vintage collectible transistor radios such as the Regency TR-1.
The A412 or (Eveready 412) is likely to be your only choice of battery replacement.