Sennheiser MOMENTUM True Wireless Instruction Manual page 7

Product overview
LED
pulses
yellow
lights up
green
flashes
red
2
If you press the LED button and no USB cable is connected, the LED
of the charging case displays the battery charge status or the char-
ging process of the earbuds for 5 seconds:
LED
lights up
green
pulses
yellow
lights up
yellow
lights up
red
flashes
red
Charging case WITH
earbuds inserted
... earbuds and char-
ging case are being
charged
... earbuds and char-
ging case are fully
charged
... a charging error/
battery error has
been detected in at
least one earbud 
(> 26)
Charging case WITH
earbuds inserted
... earbuds are fully
charged
... earbuds are being
charged via the
rechargeable bat-
tery of the charging
case
... rechargeable bat-
tery of the charging
case is empty and
the earbuds are not
fully charged
... rechargeable bat-
teries of the earbuds
and the charging
case are empty
... a charging error/
battery error has
been detected in at
least one earbud 
(> 26)
MOMENTUM True Wireless | 7
Charging case
WITHOUT earbuds
inserted
... charging case is
being charged
... charging case is
fully charged
... a charging error/
battery error has
been detected in the
charging case (> 26)
Press
1x
Charging case
WITHOUT earbuds
inserted
... charging case is
charged between
50-100 %
–
... charging case is
charged less than 
50 %
... rechargeable bat-
tery of the charging
case is empty
... a charging error/
battery error has
been detected in the
charging case (> 26)