Silvercrest STSK 2 A1 Operation And Safety Notes page 76

Checking current battery capacity status
of the charging/storage box 6 :
Briefly press the on button 9 .
The current battery capacity status is
indicated by the charging status indicator
8 on the charging/storage box:
LEDs
76 GB/IE
Battery capacity status
approx . 30 %
approx . 60 %
approx . 100 %