Please make sure you charge your Vest Edge with the provided fast-charger that came with it!

Note: The USB-C port can be used for charging too, as long as you use a USB-C Power Delivery 20V/5A wall charger. Connecting the Vest with a USB-C cable to a cell-phone charger or to a PC WILL NOT charge your Vest. 

You can find more information in this article.