Sony XBA-BT75 Operating Instructions Manual page 9

Tips
 When the battery of the carrying case is
sufficiently charged, you can use the
carrying case as a battery charger for the
headset, without the need to connect to a
computer. The headset indicator lights up
while charging, and goes off when
charging is completed.
 If you put the headset in the carrying case
without turning off, and close the cover,
the headset will be turned off and charging
starts automatically. The headset cannot
be turned on while charging.
 If you charge the carrying case by
connecting to an AC outlet, use the USB
Charging AC Power Adaptor AC-U50AG
(sold separately). For details, refer to the
manual supplied with the adaptor.
Charging the carrying
case only
If the carrying case is sufficiently charged,
it can be used as a battery charger for the
headset without connecting to a
computer.
When the carrying case battery is fully
charged, the headset can be fully charged
about 2.5 times*.
* This may vary, depending on ambient
temperature or conditions of use.
1
Connect the carrying case
(without the headset) to a
computer by the USB cable.
Charging starts and the charging
indicator lights up.
Charging is completed in about 3
hours*, and the charging indicator
goes off automatically.
* Time required for empty battery to
recharge.
Charging the headset
using the carrying case
If the carrying case is sufficiently charged,
it can be used as a battery charger for the
headset without connecting to a
computer.
1
Put the headset in the carrying
case and close the cover.
Charging starts and the headset
indicator lights up.
Charging is completed in about 2
hours*, and the indicator goes off
automatically.
* Time required for empty battery to
recharge.
Caution
If this unit detects a problem while
charging, the indicator (red) may turn
off, although charging is not complete.
Check for the following causes:
– Ambient temperature is too low
(approx. 10 °C or lower).
– Ambient temperature is too high
(approx. 35 °C or higher).
– There is a problem with the battery.
Firstly, try charging the battery in a
suitable temperature range. If the
problem persists, consult your nearest
Sony dealer.
Notes
 If the life of the built-in rechargeable
battery drops to half the normal length,
the battery should be replaced. Consult
your nearest Sony dealer for replacement
of the rechargeable battery.
 Avoid exposure to temperature extremes,
direct sunlight, moisture, sand, dust or
mechanical shock. Never leave in a car
parked in the sun.
 Set the computer to not enter hibernation
mode while charging. Charging will not be
completed properly in hibernation mode.

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