I don't know if there is a best wireless charger, but you certainly want one that can do 15w+ fast wireless charging. Magsafe wireless chargers will only give you 7.5w to a Samsung phone, so if speed is your thing with wireless charging, I would avoid Magsafe wireless chargers. Otherwise, it depends if you're looking for a standup charger where your phone will rest on it standing up, or a pad. Standup chargers also come in variants that have also a pad for your earphones and a place for your Samsung watch to charge as well. Flat pads come in different styles. All-in-all the charging plug that goes into the wall for these must be capable of producing enough power for fast wireless charging. Either they will come with one, or you will use the fast charger you have for your phone.
As far as charging phone cases - if you're talking about cases that can charge the phone, I only know of two out there that both have a 10,000mAh battery in the case and it makes your phone considerably thicker. Newderry's charging case is a bit more ergonomic and smaller than the one from Zerolemon which looks like a total brick - literally. It's square on all edges. It looks ugly, but it will give your phone more protection than the Newderry one which offers very little protection.
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