Vorwerk VC100 Kobold Instruction Manual page 42

14 Operation
The effi cient charging system of the Tabletop vacuum cleaner switches off auto-
matically if the batteries are fully charged.
The Tabletop vacuum cleaner can remain in the charging unit without risk. The
mains charger becomes slightly warm; this is an entirely normal process.
If you do not intend to use the Tabletop vacuum cleaner for a longer
period of time (e.g., vacation), disconnect the mains charger from the
mains socket to save power and prevent a fi re hazard as a result of
short circuits from voltage peaks etc. (e.g., during thunderstorms).