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URL to an example of what you use?

I use cheap ones from Amazon (link below). I power them with 12V adapters which I "shucked". 5V is not enough to provide enough voltage because you lose some in the conversion.

https://www.amazon.es/gp/product/B07PBCYTFW

These adapters seem similar to what's used in that instructibles link. I didn't pick these for any specific reason other than they were available on Amazon. It uses the same LM2596.

https://www.instructables.com/Powering-a-Android-Device-From...

https://old.reddit.com/r/homeassistant/comments/13ovuqn/ive_...

You can use an LM2596 to step down the voltage.

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