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It looks like they use 200ma to 400ma and then up from there for the fancy azz ones
I wouldn't recommend using these things constantly on a laptop especially if you have other garbage plugged in
USB 2.0 laptops often struggle to keep up with half the 500 they're rated for
You should be just fine with USB 3.0 as it's supposed to be I believe 900ma but still why fuck around (if you have good expensive hardware which can handle it for sure, then, why risk fucking it up... Meanwhile if you have cheap garbage hardware it cannot handle it)
Is USB 4.0 higher power
Anyway I don't recommend using laptop USB ports as power supplies.. So don't hook these u up to them and stop charging your telephone battery from your laptops.
I'm old so don't explain to me if I am wrong
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