Charge The Built-In Battery - Philips BT3900 User Manual

•
To manually check the battery level,
briefly press
power-off mode.
» The different behavior of the four
LEDs indicates different battery
levels.
LED indication:
LED 1 LED 2 LED 3 LED 4
Battery LED 1 LED 2 LED 3 LED 4
power
Full Solid white
> 80% Solid white
50% - Solid white
80%
20% - Solid Off
50% white
Low Flash Off
battery red
(<20%)

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
flashes red as illustrated.
EN
5
in either power-on or
Off
Off
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 Battery
status status
On During
charging
Off During
charging
Off Fully
charged
System behavior
Beep once,
without
charging
indication.
Shows the
charging
indication
All LEDs are on,
then turn off in
three minutes.