Using EMF or Gauss/Tesla measurements to test batteries ?

[HKJ]

@Chloe

I have a gauss meter, but have not measured cells (chargers are more interesting to measure). I don’t see how a phone app can properly measure as it’s electromagnetic fields?

Smartphones do have magnetic sensors (3D compass), but what exactly you get from measuring a battery I do not know.

gauss=magnetic field.

Radio waves=electromagnetic field