Q: While charging a device with the PowerPack 20K, if I plug in another cable in the other port to charge a second device, there is a brief pause before charging again. Is this normal?
A: Yes, this is normal. The three ports draw power from the same battery, so they share the total power available. Additionally, the two USB-A ports are controlled by one controller chip. So, when a second device is connected to the battery pack, the battery pack will need to briefly stop the ongoing charging and renegotiate with the devices under various charging protocols. Limited by the circuitry design of this product, this is the most robust method to handle scenarios where devices are attached one at a time.