I want to give the wireless charger a try...just don’t want to degrade the battery life due to any overheating. The wireless charger does have a built in fan to cool the phone when charging. Does that really help?
I looked at charger with a fan, but I couldn't see it doing a whole lot of good since I have a plastic case on my iPhone X. I'm betting the fan on the charger is mostly a gimmick. Wireless charging does generate some heat, but so can a hard working mobile CPU. I have felt my old iPhone 6 get quite hot when running a demanding app, and sometimes when charging on the wired charging cable... probably because it was using that idle time to index or a background app was running amok. I have yet to feel my iPhone X get that warm, and it doesn't seem to get warm at all on my 5W charger. A 7.5W charger might generate more heat? I'm no battery or electrical expert. The following article has some information:
https://www.computerworld.com/artic...ireless-charging-bad-for-your-smartphone.html
So my takeaway is that wireless charging might degrade the battery slightly faster than wired charging, but not enough to be a concern over the convenience. It sounds like keeping your battery always charged up to 100%, or letting it go down to near zero and then charging it all the way up again, will cause more problems... but even that may not be worth worrying about according to the person interviewed in the article who says, "Srinivasan also cautions against being too sensitive to your smartphone or tablet charging. Most smartphone manufacturers design batteries to last two to three years, so if you're a consumer who typically replaces your phone after that amount of time, you don't need to be overly concerned with charging rates."
Android users have had access to wireless charging for a couple of years and even though there are some discussions about how warm the device gets, I'm not aware of any major problems caused by wireless charging.