Instead of increasing the battery percentage is decreasing while charging and gaming simultaneously using side port please help.
The official position does not recommend charging while playing games, which hurts battery life.
Playing Asphalt 9 with the Air-cooler 2 attached and 30W charger plugged into the charging port of th Air-cooler 2, the phone charges very fast. The same as it would charge on stand-by. The 30W charger gives enough energy to run Air-cooler 2, play the game in X-mode set to max performance and charge the battery. Very satisfied with that!
The most common reason why your phone is not charging fast enough while gaming is because it's too hot. The phone will decrease charging to protect itself. By using the aeroactive cooler you will decrease the temperature and increase the chance of charging at full speed