How do I know HYmini is fully charged by AC-DC wall-plug adaptor ?
A. Using the AC-DC adaptor provided in the box, connect HYmini™ to a 110/220 wall electrical outlet through the DC input jack. An indicator on the side, adjacent to the USB outlet, turns red when the device is charging. Once the indicator turns green, it implies the internal battery has completed charging. Note that a safety control circuit protects the device from being overcharged.