The ego 510 threaded charger is used to charge almost all vape pen style ego batteries. To use simply screw the threaded end of the charger onto your vape pen and plug the charger into a standard usb charging brick or a usb port on a laptop or computer. It is not recommended that you use a rapid charging brick to charge with your 510 threaded battery as this may degrade the life of the battery. It should take approximately 60-90 minutes to fully charge a 650-1300mah ego batteries. These are the batteries you will use for your standard cartridge atomizer.