Remember off

For me, the question arises why Varta not just a symbol of the charging status displays instead of volts display. In addition, there are always discrepancies (between 0.02 to 0.1V) to the battery charger. An Auto OFF function would would also be useful then the batteries would (if you forget to switch the part of) not as quickly discharged.
For me, it will soon be replaced by another tester.