At some point, the battery of your power tool will no longer work for more than a few seconds in your power tool. But, you can still use it for many hours in a low power application such as a light.

Buy this light fixture

• The problem - what to do with a battery that is no longer suitable for the power tool?

• Theory and inspiration

• Development and build

You are welcome to download the electronics schematics and the 3D printable files

• Schematic, PCB (KiCAD) and Gerber files

• 3D printable, STL files