
That's 9W not 20. I have an S21, I used this and compared it to the original Samsung 9W I got with my S8. Same loading time. I checked the battery settings and the same power flow. The cable I used with this charger is an OEM Samsung USB-C cable, so there's nothing wrong with that. Fast and super fast charging included. I got it cheap, but I didn't expect 20W at all. Only 9 watts.

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