4SR44 or 4LR44 battery is a small cylindrical battery often used in dog collars, film cameras, small LED flashlights, car security systems, remote controls, toys, and similar
Typical Labels: 4SR44 (silver-oxide), 4LR44 ...
Chemistry: Alkaline
Nominal Voltage: 6.0 volts
End-Point Voltage: 3.6 - 4.0 volts