Sony SRS-BTS50 - Manual (Page 34)

may turn off, although charging is not completed.
Check for the following causes:
Ambient temperature exceeds the range of 5 °C – 35 °C (41 °F – 95 °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
Charging time varies depending on conditions of use of the battery.
Charge the system in the ambient temperature between 5 °C and 35 °C (41 °F
and 95 °F).
The system will get warm during charging. This is not a malfunction.
Even if you do not intend to use the system for a long time, charge the battery to
its full capacity once every 6 months to maintain its performance.
If the system is not used for a long time, it may take longer to charge the
battery.
If the life of the built-in rechargeable battery became extremely short, 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 the system in a car parked in the sun.
Battery life (when using the BLUETOOTH connection)
About 10 hours
Time stated above may vary, depending on ambient temperature or conditions of
use.
When the battery is almost empty
The CHARGE indicator (orange) flashes. When the battery becomes empty, the
system turns off automatically.
Auto power off function
If the system is left in any of the following conditions for more than 20 minutes, it
turns off automatically.
No BLUETOOTH connection has been established between the system and the
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