Why is my Galaxy Watch7 charging slowly with my old wireless charger?

The Galaxy Watch7 features a redesigned rear sensor for enhanced accuracy compared to earlier models. This update enables the device to capture additional health data points and improve measurement reliability during extended or specific exercises.

However, this new sensor design necessitated a change in the shape of the rear glass, increasing the distance between the internal wireless charging coil and the device. Consequently, this may lead to slower charging speeds and higher heat generation.

For optimal charging efficiency, it is recommended to use the provided wireless charger specifically designed for the Galaxy Watch7 (EP-OL300).