The VOLKIT camera hub charger can only be charged by connecting the PD or QC power. At least 18W of power is required and 45W of power is recommended. It does not work when connecting adapters under 18W (old cell phone adapters, etc.) that you have previously used. Power on, but the display does not indicate PD or QC and does not charge.
When charging the drone battery, press the battery power briefly first, then press and hold one more time to unlock the battery and start charging. If the battery is not powered on, it will not charge.