How do I know if my Royal Supply Vape Battery needs to be charged?

When your battery needs to charge, the light on the battery will flash Red, 10 times. From there, to charge your battery, simply screw it into the USB charger while being careful not to over-tighten it. Once you’ve connected the battery to the charger, you can plug it into any USB port, like a computer or a phone charger wall adapter.

A red light on the charger indicates that your vape pen is charging and a green light will appear when your vape pen is fully charged and ready to go.