Sennheiser MOMENTUM True Wireless 4 Instruction Manual page 16

Using the earbuds
16 | MOMENTUM True Wireless 4
Charging the rechargeable batteries
using the USB cable
1
L
R
1. Open the charging case by overcoming a slight magnetic resis-
tance and insert the left earbud into the left charging compart-
ment and the right earbud into the right charging compartment.
The earbuds are magnetically pulled into the charging compart-
ments.
2. Make sure that the charging socket is free from moisture and con-
tamination. Connect the USB-C connector of the charging cable
to the USB socket of the charging case.
3. Connect the USB-A connector to a corresponding socket of a USB
power source (to be ordered separately). Make sure that the USB
power source is connected to the power supply system.
The rechargeable batteries of the earbuds and the charging case
are being charged.
If no earbuds are inserted into the charging case, only the
rechargeable battery of the charging case is being charged.
The LED display of the charging case indicates the charge status:
LED
pulses
yellow
lights up
green
flashes
red
If the LED display does not light up:
• Clean the contacts on the earbuds and in the charging case
(> 38).
• Clean the USB-C socket of the charging case.
• Charge the rechargeable batteries of the charging case and
the earbuds until the LED display lights up again (at least 30
minutes).
2
USB-C
Charging case WITH
earbuds inserted
Earbuds and
charging case are
being charged.
Earbuds and
charging case are
fully charged.
At least one earbud
has a charging
error/battery error
(> 40).
3
USB-A
Charging case
WITHOUT earbuds
inserted
Charging case is
being charged.
Charging case is
fully charged.
Charging case has a
charging error/bat-
tery error (> 40).