Wires were added to connect the drill’s battery connectors to a 12vdc to 120vac inverter. As the bike is pedaled, the rear wheel spins the drill, which spins the drill motor creating DC voltage.

After regulating down to 12V he feeds the output into a “cigarette-lighter” style inverter to boost back to 110V AC. The hardware is housed inside of a scrapped charger for the batteries ...

But Walmart's deals on power tools are among some of the best you'll find, including this portable inverter that's over $300 off and the perfect lifeline for emergencies and off-grid action.