Silvercrest SBL TW3 A1 Operation And Safety Notes page 63

When the integrated rechargable battery is
drained, there will be a notification sound
signal every 2 minutes and the LED 3
will blink red . The integrated rechargable
battery should then be charged as soon as
possible .
Depending on the volume and the age of
the battery, the operating time of the product
is approx . 19 hours of music playback when
fully charged .
Insert the micro-USB plug of the charging
cable 12 into the micro-USB charging socket
4 of the product . Insert the USB plug of
the charging cable 12 into the USB port on
a USB adapter (not included in scope of
delivery) .
64 GB/IE