How long does the Stick need to be charged?

If a Stick's battery is at empty, it will take around 4 hours to fully charge through direct charging depending on the Stick. However, keep in mind that charging time may vary depending on the batteries you're using, and some batteries might require a longer charging period.

If the charger has LED indicator when direct charging, you can just wait for the LED to turn off as that will indicate the Stick is fully charged.