I have been researching battery sizes looking for a battery for this old small flashlight. It is probably at least 12 years old. the diameter of the inside of the flashlight is 13.8 mm. The depth of the battery is hard to tell, I can say a AAA battery is to long as the cap will not screw on with a AAA inside. A AA battery is to big in diameter as well as way too long. If anyone has a idea of what size battery fits the flashlight please let me know.
Fred
Fred