Not applicable.
Since the power bank is mainly designed for charging mobile phone, its charging current is about 1A. When the mobile phone is fully charged, it enters a trickle charging state, and the charging current will become very small. At this time, some power banks will automatically shut off to save the power. The charging current of smart device is relatively small, which may cause a mistaken detection by the power bank that the mobile phone is fully charged.
Thus, it turns off the output and the smart device cannot be charged.