Wireless Charging S4, what's normal heat level?
I have Samsung's OEM wireless charging cover, and it's working great. Only minor heating (~32°C). Downside is it's noticeably thicker than the normal cover, and limits case choices.
So I tried the supper slim wireless charging insert from Amazon (the 0.6mm one). It's certainly slim, but it heats up something fierce (45°C).
Any thoughts on what's safe? What temp will harm the battery?
To the EE folks, is the heat a function of the slimness? The smaller/thinner the mag coil, the more heat?