Using the Mahle X20/X30 Energy Hub is a breeze. First, connect the External Battery eX1 to the Energy Hub via the standard USB - C port to start charging the battery. Once the External Battery eX1 is charged, you can use it to power other devices. Just plug your device into the battery's output port. When not in use, keep the Energy Hub in a cool, dry place. Avoid exposing it to extreme temperatures or moisture. To maintain its performance, clean the ports regularly with a soft, dry cloth. If you encounter any issues, contact our customer service team.