Are Gaming Mobile Coolers Safe ?

I love first-person shooter games, especially "PUBG Mobile." However, if you want to play with a case on, prolonged gaming may cause the phone to heat up.I discovered MagSafe Mobile coolers, which adhere to the center of the device and cool the processor when playing games.

—This improves battery life and prevents frame rate stuttering. I don't want to take the chance since I had my 16 Pro Max replaced because of a hardware problem with the original device. If any of you have had problems or none at all, please share your stories.Thank you ahead of time.