High Capacity & Fast Charging: Build your own power bank with this DIY kit compatible with 4x21700 batteries. Features a powerful PD20W output to charge your devices rapidly. Universal Compatibility: Designed to ensuring a wide range of use. Intelligent LED Display: Comes equipped with a clear LED screen that displays charging status and battery levels at a glance. The parent case also allows you to see the inner workings, adding a stylish touch to functionality. Durable and Portable: The robust and lightweight design makes it easy to carry. Ideal for travel, business trips, or daily use to keep your devices powered throughout the day. Without battery. Due to different batches, there may be differences in product appearance and printed text, which will not affect use. Colour:B:Black/A:Orange Material:ABS Package Contents: 1 * Power Bank Case(Without battery) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.