Sorry, that was a misunderstanding. I tested many things. Different cables, some PSUs and found out it´s impossible to make this charger work like my other chargers.
It could be the VC4SL is over-sensitive with the PSUs but QC or not, the sometimes extreme early terminations on NiMH are reality. These are even more annoying than the decisios about the charge current of the charger
Using the V C4SL rarely, it seems to work better with LiIon, but I would expect more than that because other brands do overall better