Search for Belkin usb charger. I use a 4-port Belkin charger that, as well as charging multiple devices (Apple and others), also supplies a HomeKit hub with a permanent 5v supply. Never gone down in several years.
Anker 60W 2-Port USB C Charger, PowerPort Atom PD 2 [GAN Tech] Compact Wall Charger, Power Delivery for MacBook Pro/Air, iPad Pro, iPhone 11 / Pro/Max/XR/XS/X, Pixel, Galaxy, and More
www.amazon.co.uk
It provides 9v 3a when using both ports. HomePod mini needs each port a minimum of 9v 2.22a to run, I've tried the mini on a 9v 2a (18w) charger and it won't work.
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You must get a charger that has TWO ports, able to simultaneously support 20W or more each, and also with the "PD3" profile on each. I'm not sure it exists, I know there are chargers that have multiple ports but typically only one has the 20W+ and PD3 profile.
Anker 60W 2-Port USB C Charger, PowerPort Atom PD 2 [GAN Tech] Compact Wall Charger, Power Delivery for MacBook Pro/Air, iPad Pro, iPhone 11 / Pro/Max/XR/XS/X, Pixel, Galaxy, and More
www.amazon.co.uk
It provides 9v 3a when using both ports. HomePod mini needs each port a minimum of 9v 2.22a to run, I've tried the mini on a 9v 2a (18w) charger and it won't work.
I've got mine working on older, PD2 30 watt USB-C controllers, so yes that should work. YMMV, PD3 didn't add additional profiles, FYI, most of the changes in PD3 were around devices reporting more sophisticated battery status to the source - which is not relevant to the mini. It's confusing - but any 9v 3a USB-C PD charger should work.
I've got mine working on older, PD2 30 watt USB-C controllers, so yes that should work. YMMV, PD3 didn't add additional profiles, FYI, most of the changes in PD3 were around devices reporting more sophisticated battery status to the source - which is not relevant to the mini. It's confusing - but any 9v 3a USB-C PD charger should work.
ah! i know the 20W charger is required for the MagSafe to produce full 15W charging to the new iPhone 12 series because that requires the PD3 profile (which the Apple 20W charger has, but their old 18W and even much higher powered chargers do not) but I guess that isn't an issue for the HomePod mini... that certainly opens the options for dual minis attached to a single charger by quite a bit! thanks for the heads up.
PD2/3 adds higher voltage charging, USB is normally 5 volts,
but with PD, the device and charger can negotiate different voltages.
in the PD charging spec, the higher the wattage a charger supports, the higher the voltage it must also supply.
The 20 watt also provides 9 volts
while if you go up to higher wattage chargers, it goes up to 20 volts
you can find breakdowns online, but it's something like "up to 20watts - 5 or 9v" "20 to 30 watts - 5, 9 or 12v"
so you must find a PD charger, just going higher wattage on a non-PD won't get the voltage you need.