How do I know when the USB Wall Charger is charging my devices? August 17, 2018 16:17 Updated The charging indicator on your device will let you know when charging begins. Related articles Can I use the USB Wall Charger outside the United States? CHAMP Lite Portable Charger User Manual Is the USB Wall Charger capable of powering my laptop at a fast-charging speed? What type of USB cables should I use with the USB Dual Wall Charger? CHAMP Series 2 Portable Charger User Manual