Q: Is the PowerPack 10K compatible with an LG Nexus 5X? And if so, do I need to purchase an additional cable?
A: The stock cable for the Google Nexus 5X (made by LG) does not work with this battery pack. The LG Nexus 5X comes with a USB-C to USB-C cable with the USB-C being the new, small-sized, reversible tip. To make the battery pack work with your phone, you will need a different type of cable that has USB-C on one end and a classic USB on the other end (USB-A to USB-C). Charging will be at normal speed (no fast or rapid charging). To refuel the battery pack, you can charge it in the exact same way as you charge your LG Nexus 5X. The battery pack does have a USB-C input port for taking in charge (the port does not support output, however).