Why does the mini camera heat up when charging?

Why does the mini camera heat up when charging?

Normally, all batteries will generate heat when charging. Charging is an energy conversion process. The current is large, and the battery generates heat due to internal consumption. But it won't be a problem if it's not too hot. You didn't feel it before because it was hot before, but now it's cold. It’s obvious when the temperature rises a little!

There is another possibility that it is caused by working long hours. You can use it for a while, take a break, or use spare batteries.

Extension: Miniature camera: Testing the miniature camera mainly tests the clarity and color reproduction, illumination, and backlight compensation. Secondly, it tests the distortion, power consumption, and minimum operating voltage of the miniature camera.