A portable light source is a device designed to provide illumination in various settings without being fixed to a power outlet. Common examples include flashlights, lanterns, and headlamps. These devices often use batteries or rechargeable power sources, making them convenient for outdoor activities, emergencies, or areas with limited electricity. Portable light sources come in various sizes and brightness levels, catering to different needs. Some are designed for specific tasks, such as camping or hiking, while others are suitable for general use. Many modern options also feature energy-efficient LED technology, which extends battery life and reduces energy consumption.