4LR44 battery is common in cameras and dog collars, for example. Cheap and fast delivery by mail. Voltage 6V

Ansmann 4LR44 alkaline battery, used in cameras, remote controls and dog collars, for example.
NOTE! The battery is not rechargeable.
Voltage: 6V
Dimensions: 25 x 13 mm
Other similar type numbers are V4034PX, PX28, 4MR44, V4034PX, 4H-C, 4NR44, HM-4C, PX28A, A544, 4LR44, K28A, V34PX, 7H34, 4NZ13, V4034PX, L1325, 4G13, 4034PX, PX28AB, 1414A, 4SR44, V4034 PX, V 4034PX, V 4034 PX