The Cellularline Thunder 20000 is a high-capacity portable charger designed to keep your devices powered during long trips or busy workdays. It features a substantial 20,000mAh capacity using cylindrical 21700 cells, providing enough energy for multiple charges of most smartphones and tablets. You can connect two devices simultaneously through its dual ports, including a USB-C port that supports 20W Power Delivery for faster charging and a USB-A port with 18W adaptive fast charging. The blue exterior is finished with a soft-touch coating and non-slip painting, which makes the 420g device comfortable to hold and less likely to slide off smooth surfaces. An integrated LED indicator and an on/off switch allow you to easily monitor the battery status and manage power. This set comes ready for use with an included USB-C to USB-C cable and instructions.