Sony DR-BT21iK Operating Instructions Manual page 12

Sony operating instructions wireless stereo headset dr-bt21ik
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Caution
If the headset detects a problem while charging, the headset indicator (red) may
turn off, although charging is not complete.
Check for the following causes:
– Ambient temperature exceeds the range of 0 °C – 40 °C (32 °F – 104 °F).
– There is a problem with the battery.
In this case, charge again within the above-mentioned temperature range.
If the problem persists, consult your nearest Sony dealer.
Notes
 If the battery is not used for a long time, battery may be quickly depleted,
however, after a few recharges, battery life will improve.
 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.
 Use only the supplied AC power adaptor. Do not use any other AC power
adaptor.
Battery usage hours
Status
Communication time (including music
playback time) (up to)
Standby time (up to)
* Time stated above may vary, depending on ambient temperature or conditions
of use.
12
*
Approx. usage hours
11 hours
100 hours

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