Miboxer C4 18650 Battery Discharge mAh meter

How to charge discharge a 18650 battery using the Miboxer C4 charger .
Not this only works on charging port 4 .
I have been told by others this charger dosnt support discharging cells but this is proof they are wrong.

[@schlaubstar]

The problem is, that Miboxer has various Versions of the C4 ... just look into a current manual and you will see, that they have completely removed the caption about the "Discharge/Test" function of slot 4.