Comment by scottlamb
5 years ago
* Make sure they are UL listed for safety, as Animats pointed out in an earlier discussion. [1] Some aren't, even from well-known brands like Anker.
* 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.
Even-though the Anker brick I have does not have an Underwriters Laboratory logo on it, it does have a TUV and a CE logo. TUV is the equivalent to UL but is a testing house mostly geared towards Europe.
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.
A TUV mark would only be accepted in North America it was a cTUVus stamp on it.
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).
The Anker power charger I have on my desk has a cTUVus logo on it.