Stylish Thin Professional Medical Diagnostic Penlight LED Silver

This penlight appears stylish, quality materials. The switch functions by pinching the clip to the metal ring around the pen cylinder (takes some getting used to but I figured out the technique). This completes an electrical circuit that turns on the bright white LED light. The 2x AAA batteries inside are a brand I do not recognize, so doubt the battery life will be as good as duracell or energizer. However, it is easy to unscrew the bulb tip to replace with new batteries when needed.

was not happy with this, I used twice and it wouldn't work anymore, changed batteries and still doesn't work