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1. Connect the charger to a wall outlet.
2. Connect the charger cable to the charger connector. The
indicator light is red while charging. It may take a while
before charging starts. If charging does not start,
disconnect the charger, plug it in again, and retry.
Charging the battery for 15 minutes provides about
5 hours of talk time with the AC-4 charger. Charging
the battery fully may take up to 45 minutes with the
AC-4 charger.
3. When the battery is fully charged, the indicator light
turns green. Disconnect the charger from the headset
and the wall outlet.
The fully charged battery has power for up to 11 hours of
talk time or up to 300 hours of standby time. However, the
talk and standby times may vary with different compatible
Bluetooth devices, usage settings, usage styles, and
environments.
To check the battery charge when the headset is not
connected to a charger, briefly press the power key. When
the indicator light is green (displayed for about 3 seconds),
the charge level is sufficient. When the light is yellow, you