Cigarette lighter adapter plug for a cordless drill.
Most cordless tools have spade connectors which come into contact with the battery pack such as this one:
Sometimes the batteries go bad, and are not worth the cost of replacement. The tool is still good. It would be a waste to throw it out. There is another option. A cigarette lighter provides enough power to run the tool. A booster pack is portable, and would provide sufficient current. Here's a modified wiring harness with female spade connectors to connect to the tool:
Important note: Always make sure that the polarity is correct before you connect this modified wiring harness to the cordless tool.
Here's a photo of the wiring harness connected to the spade connectors:
Insulated connectors were chosen for safety in the event that if one of them should accidentally disconnect, it won't come into contact with the opposite connector, and create a short ciircuit. Always use the proper gauge wire & fuse.