Sennheiser BW 900 - Manual (Page 18)

Basic settings
18
Power management
How long does the battery last?
The battery life depends on the distance between headset and the base
station or Bluetooth device and corresponds to 4 to 5 hours of talk time.
To prevent the battery from running flat:
f Place the headset in the headset cradle
º
when you are not using it.
The battery is recharged.
Indications when the battery is about to run flat
When the battery is about to run flat:
• The hook LED
´
flashes red three times every 15 seconds.
• The headset LED
ቧ
flashes red three times every 15 seconds.
• Three beeps are heard every 15 seconds, however, after three times
there is no further warning.
Note:
With every new connection either to the base station or to the Blue-
tooth device the warning sequence will start again.
Charging the battery
Note:
If you charge the battery for the first time, allow charging for at least
4 hours without interruption.
To charge the battery in the headset:
f Place the headset in the headset cradle
º
.
The headset charging LED
»
lights up red to indicate that the battery
is being recharged. When recharging is complete, the headset charging
LED
»
lights up blue.
To charge a second battery:
f
Insert the battery in the spare battery charging slot
¶.
The spare battery charging LED
¿
lights up red indicating the battery
is being recharged. When recharging is complete the spare battery
charging LED
¿
lights up blue.
Note:
When – after 2-3 years – the battery capacity is reduced significantly,
replace the battery with a new one.
º
´
ቧ
»
¿
¶ º