To open the battery compartment with a screwdriver which not only has advantages. The screws are tiny and in my opinion easy to lose. Let us hope also that the appropriate screwdriver far from can be found when needed at home.
The proposed calibration I first made not because I do not have 20kg weight at hand (see calibration instructions). Comparisons with 2 digital scales in the range 10-25kg gave no deviations, the talk would value (2 to 5 g).
