Charge your airLUX battery for 15 minutes to ensure it has a charge and then plug the headlight into the airLUX battery.
(If your headlight is always ON and cannot be turned OFF then skip to Step 3)
Pass the airLUX battery in very close proximity with the ProLUX/V3 Charger (or other high-output power supply) to turn the light ON. *** Be sure the charger/high-output power supply is powered on.