extremely small single led light

thingiverse

This compact design requires just three LR44 watch batteries and an LED, resulting in a minuscule flashlight measuring only 10mm by 14mm. To prevent any electrical issues, ensure the batteries are securely wrapped in shrink wrap or some other thin insulating material, such as Kapton tape, which can serve as a makeshift solution in a pinch. This design isn't intended to be a standalone flashlight but rather a modular light source that can be easily integrated into various projects.