Features: The 21x18650 Battery Storage Box is a must have for DIY enthusiasts, allowing you to create your own power bank with ease. This storage box with bright light features quick charge with power of 5V 3A, 9V 2A, and 12V 1.5A, ensuring fast and efficient charging for your devices. Designed for all users, this battery holder box is compatible for 18650 flat top batteries, providing a reliable and convenient power solution for everyone. Whether you're traveling, working, this power bank case is perfect for any situation where you need a portable and reliable power source. 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. Specifications: Material:Plastic Number of batteries: 21x18650 batteries Color:Black,White; Option Type:D21 Black Power Bank Case,D21 PD Black Power Bank Case,D21 PD Black Power Bank Case,D21 White Power Bank Case,D21 PD White Power Bank Case,D21 PD White Power Bank Case, D21 Power Bank Case with Light Output/Input:5V2A D21 PD Power Bank Case Output:5V3A,9V2A,12V1.5A,5V4.5A; D21 PD Power Bank Case Input:5V3A,9V2A,12V1.5A D21 PD Power Bank Case Support 15W Wireless Charging; D21 PD Power Bank Case2 Output:5V3A,9V2A,12V1.5A,5V4.5A; D21 PD Power Bank Case2 Input:5V3A,9V2A,12V1.5A D21 PD Power Bank Case2 Support 15W Wireless Charging; Package Includes: 1xPower Bank Case (Battery not include) note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.