Holds up to 8 x 18650 batteries, providing enhanced capacity and extended usage time. It features a digital display to show power status and has a builtin camping light to illuminate your surroundings. Designed for travel charging and mobile use, making it convenient to power devices on the go. Note: 18650 batteries are not included and must be purchased separately. Only 18650 batteries with a flat positive electrode are compatible. Pay attention to the direction of the positive and negative poles. After installing the battery, fully charge and activate the unit before outputting power. Crafted from durable materials, this powerbanks case delivers stable performance and longlasting reliability. Use scenarios: Outdoor adventures: camping, hiking, or backcountry trips where you need portable power and a light source. Travel and commuting: road trips, car trips, or daily excursions requiring mobile charging for devices. Backup power at home or work: handle brief outages or charging needs when outlets are not readily available.