The FCC has confirmed that the Galaxy S10 trio will support reverse wireless charging and not just that, it even listed the max power - 9W. If that doesn't sound impressive, allow us to put it into perspective. "Fast wireless charger" for the current Galaxy S9 also provides 9W. Huawei doesn't officially say how fast its implementation of reverse wireless charging is, but independent testing shows it's under 5W. Charging accessories wirelessly with your phone is a great feature, but somewhat inconvenient as you have to keep them together (and steady too, otherwise they would go out of...
Source: https://www.gsmarena.com/fcc_samsung_galaxy_s10_will_support_9w_reverse_wireless_charging_wifi_6-news-35369.php
