Fast Charging: Experience rapid charging with 20W power output, ensuring your devices are powered quickly and efficiently. DIY Friendly: Customize your own power solution with this easy-to-assemble DIY power bank case, perfect for electronics enthusiasts. Dual-Mode Power Supply: Switch between UPS and standard power modes to best suit your needs, providing flexibility and reliability in power supply. Portable Design: Compact and , this power bank is ideal for on-the-go use, fitting easily into bags and pockets. Compatibility: Designed to accommodate 21700 batteries, offering high capacity power storage for extended use. Color:Gray Material:ABS Package Contents: 1 * Replaceable battery power bank case 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.