Smart home hub charging typically uses typically a low-wattage 5-10W barrel or USB adapter. Smart home hubs are usually always-on rather than battery-powered, so their ‘charger’ is really a continuous power supply rather than a battery charger in the traditional sense.
What to know before buying a replacement
Check the original charger’s exact voltage and connector before substituting a generic one — smart home hub charging systems vary more than phone or laptop charging, where standards have converged.