Usually, the Healy should be fully charged after 4 hours of charging, but if you have just purchased a Healy, it might be that the Healy is deeply uncharged, meaning that it should be charged for 12 hours. Another thing to look out for is to notice if the green light on the Healy is very subtly flickering during the charging. If it is, it means that it is charging properly, if it is not, reset the charging process, connect to another charger with more power, try another power outlet/socket or press the power button during charging. If the issue persists, reach out to support.