Philips BT3900 - Charge the built-in battery

5 EN
• To manually check the battery level,
briey press
in either power-on or
power-o mode.
» The dierent behavior of the four
LEDs indicates dierent battery
levels.
LED indication:
LED 1 LED 2 LED 3 LED 4
Battery
power
LED 1 LED 2 LED 3 LED 4
Full Solid white
> 8% Solid white O
50% -
80%
Solid white O
20% -
50%
Solid
white
O
Low
battery
(<20%)
Flash
red
O
Charge the built-in battery
Note
•
It takes you approximately three hours to
fully charge the battery.
• The micro USB socket is for charging only.
• Rechargeable battery has a limited number
of charge cycles. Battery life and number of
charge cycles vary by use and settings.
When the battery level is low, LED 1
ashes red as illustrated.
To charge the built-in battery:
• Pull out the USB cable from the
USB lanyard cable as illustrated.
• Connect the speaker to AC
power by using a power adaptor
(not supplied; 5V 0.5A adaptor
recommended).
System
status
Battery
status
System behavior
On During
charging
Beep once,
without
charging
indication.
O During
charging
Shows the
charging
indication
O Fully
charged
All LEDs are on,
then turn o in
three minutes.