Sony XBA-BT75 Operating Instructions Manual page 10

 Use the supplied USB cable only, and
connect the carrying case directly to a
computer. Charging will not be completed
properly by an indirect connection, such
as via a USB hub.
Headset usage hours*
Status
Communication time
(including music
playback time) (up to)
Standby time (up to)
* This may vary, depending on ambient
temperature or conditions of use.
Checking the remaining
charge of the battery
Headset battery: when turning on, the
indicator (blue) flashes twice, and then
the indicator (red) flashes. Check the
remaining charge by the number of times
the indicator (red) flashes.
Carrying case battery: when you press
the battery status check button, the
battery status indicator flashes (page 7).
Check the remaining charge by the
number of times the indicator (red)
flashes.
Indicator (red)
3 times
2 times
1 time
Note
You cannot check the remaining charge of
the carrying case battery while charging.
When the headset battery is almost
empty
The indicator (blue) lights up.
When the battery becomes empty, a beep
sounds and the headset will turn off
10
automatically.
GB
Approx.
usage hours
3.5 hours
400 hours
Status
Full
Mid
Low (needs to be
charged)