The brand name of a particular type of wind-up radio invented by Trevor Baylis in 1993. He got the idea when he realized that in many regions of Africa, radio was the only available media, but most people could not access or afford batteries or electricity.

The Baygen radios typically take about 30-60 seconds to wind up, and play for about 30 minutes, depending on the volume, and uses more power for FM than AM. Newer models also come with a solar cell which can override or reinforce the power generator supply.

There are now also wind-up flashlights, and a smaller version of the wind-up radio available. You can usually find these products in nature stores in your local mall. They are useful for power outages, as you won't have to worry about having enough batteries.