This is something I've noticed after using wireless charging to charge overnight for the past few months. I've been using the Nokia wireless charger, and in the morning the phone is usually warm. It's not hot. I checked temp and it's around 95F which is about how it gets after 5-10 min of browsing. I'm not concerned about the temperature, however I was just curious why I've never observed that with wired charging. I know that wireless charging heats up the phone more than wired charging, but after hitting 100% I thought it would act similar. After picking up the phone in the morning it feels cool when taking it off a wired charger. Granted, I've only used this one wireless charger for overnight charging. I have the nexus wireless charger that I keep in the car. I suppose I can try and see what results I get with that.
Anyway, just curious why you guys think. Again, I'm not overly concerned, but just wondering if the phone treats trickle charge differently when using wired vs. wireless.