A Samsung phone on a Qi2 pad will charge at 5-10W, not 15W, because Samsung uses a non-standard protocol (EPP with proprietary handshake).
"Cut the cord without cutting the speed. The onn. Wireless Charging Pad offers a streamlined solution to power your daily driver. Simply place your Qi-enabled smartphone on the pad and watch the battery icon light up. With a slim, modern aesthetic and built-in safety features, it’s the perfect charging companion for home, office, or travel. Supports fast charging speeds for both iPhone and Samsung devices, delivering power exactly where you need it, hassle-free." onn wireless charging pad
Setup is instant. Simply plug the pad into a USB power adapter (wall adapter typically required, not always included), place your phone on the center of the pad, and charging begins automatically. A Samsung phone on a Qi2 pad will