And now power supplies are getting another step smaller and more efficient by switching from silicon transistors to GaN. (https://www.cui.com/blog/how-gallium-nitride-gan-enables-sma...)
Hopefully this tech finds its way into more devices as it gets cheaper. It would be neat to have GaN based inverters for electric cars.
Plug that into the MacBook charger and you’re good. No problem here, is it not working for you?
* If they are multi-port, make sure you're happy with how they distribute power. Most likely you want the majority of the power going to port 1 where you stick a laptop, but some drop it down to 50W or lower if you just have a cable in one of the other spots, much less any device connected.
I love the monoprice ones. They're small, inexpensive, inconspicuous, and meet the standards I described above. They also charge all my devices reliably, unlike my (larger, I think non-GaN) Nekteck chargers that spend their time in a drawer now. Buy a 5A cable to get the full 100W out of them at 20V.
That being said, TUV like UL is listed as a Nationally Recognized Testing Laboratory (NRTL) in the United States (for more information see: https://www.tuv.com/usa/en/ctuvus-certification.html) and thus is just as safe.
The UL logo may be more recognizable in the US, however they too certify for both markets, with UL also having their UL EU certification program.
What I wonder is if TUV in Europe just tests at just 240V if it’s labelled 100v-240v, or across the labelled voltages (though lower voltage should mean fewer problems).
90% of them are in fact just exact copies of Navitas reference design, and are made by just a few factories which sell white label.
(https://www.amazon.co.uk/Charger-Anker-Durable-PowerPort-Inc...)
In fact, the Apple power brick that came with my M1 MacBook Pro is still in its original packaging; I have not used it yet. The 65 Watt RAVPower one seems as if it's about half the size. More than half the mass, though.
(I have never needed to try warranty support for RAVPower things.)
All of those smaller things cost less, so the finished product has lower production costs.
Stall torque == current.