Features: This not solder 18650 battery holder case allows effortless assembly and quick battery swaps, eliminating the need for technical skills or tools—perfect for creation. Engineered with impacts resistant plastic and 7 slot precisions design, it securely organizes batteries while offering drop protections and space efficient portability for mobile charging solution. Designed for hobbyists, outdoor enthusiasts, and travelers requiring power storage for devices like camping gear, emergencies lights, or smartphones during adventures. Optimized for outdoor excursions, daily commutes, and emergencies scenarios where quick access power with battery management proves critical. Its snapping together structure enables assembly—simply insert batteries into pre aligned slots and connects terminals for continuous device charging on the move. Specifications: Component: Plastic Color: Black/White Color: Approx. 6.14x3.07x0.86inch(156x78x22mm) Package Includes: 1x Mobile Power Boxes Cover note: 18650 batteries are not included in the package, you need to purchase separately. Please pay attention to the direction of the + and - poles. Do not close the cover untills the test it is finished, it can not open again if closed. After installing the battery, please fully charging it and activate it before outputting. Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.