Flashlights are portable handheld devices that emit light, typically powered by batteries. They are commonly used for various purposes, including outdoor activities, emergency situations, and household tasks. The convenience of a flashlight allows users to illuminate dark areas easily, making them essential tools for camping, hiking, and power outages. Modern flashlights come in various designs and technologies, including LED and incandescent bulbs. They can vary in size, brightness, and features, such as adjustable beams and water resistance. With advancements in technology, many flashlights now offer rechargeable options, making them more environmentally friendly and cost-effective over time.