Detachable design enables easy battery replacement without soldering, providing seamless assembly for your power needs. Holds up to eight 18650 batteries, increasing capacity and extending usage time. Includes a digital display that shows power status and a builtin camping light to illuminate your surroundings. Ideal for enthusiasts and DIYers; offers a straightforward process for creating custom power banks. Note: 18650 batteries are not included and must be purchased separately. Use only 18650 batteries with a flat positive electrode. Pay attention to the orientation of the positive and negative terminals. After installing the battery, fully charge and activate it before outputting power. Use scenarios: Camping or outdoor activities where portable power is needed for lighting and small devices. DIY projects to assemble custom power banks or battery packs for home use. Emergency backup power during outages or unexpected blackouts.