Ujjdwiurgh Portable DIY Power Bank Case for 21 * 18650 Batteries Portable External Battery Box for Mobile Phone Charging D21-PD-

2. This storage box with bright light features quick charge, ensuring fast and efficient charging for your devices. 3. Designed for all users, this battery holder box is compatible for 18650 flat top batteries, providing a reliable and convenient power solution for everyone. 4. Whether you're traveling, working, this case is perfect for any situation where you need a portable and reliable power source. 1. The 21x18650 Battery Storage Box is a must have for DIY enthusiasts, allowing you to with ease. 5. 18650 batteries are not included in the package, you need to purchase separately. Can only use the 18650 battery of which positive electrode is flat top.