US Patent 11746999 Headlamp with battery unit and booster unit

Various embodiments herein provide a headlamp with a light unit, a battery unit, and a booster unit. The booster unit includes an engagement mechanism (e.g., a bar, such as a U-shaped bar) that mechanically couples the booster unit to the battery unit to provide additional power. The engagement mechanism may further form a clip to couple the booster unit to another item when the booster unit is not coupled to the battery unit. The booster unit may include one or more lights, one or more controls for the one or more lights, and/or an outgoing power port to provide power to another device (other than the battery unit and light unit). Other embodiments may be described and claimed.