Sony SRS-HG1 Help Manual page 49

If a AC power cord or conversion adaptor is supplied
The shape of the plug on the USB AC adaptor and the connection method differ. According your country or region, connect the
AC power cord and conversion adaptor to the USB AC adaptor.
Lifespan of a lithium-ion battery
When making a BLUETOOTH (SBC) connection: Approx. 12 hours (at normal playback)
When connected to a network: Approx. 8 hours (at normal playback)
*3 When the specified music source is used, the BLUETOOTH device is set to the maximum volume, and the volume level of the speaker is set to 33.
The battery life when the volume level of the speaker is set to maximum will be 4 hours.
*4 When the specified music source is used, the network device is set to the maximum volume, and the volume level of the speaker is set to 33. The
battery life when the volume level of the speaker is set to maximum will be 4 hours.
When the battery is running low
When the CHARGE indicator flashes slowly, the battery is running low and needs to be charged. Charge the speaker by
connecting to an AC outlet via the USB AC adaptor.
Hint
Even when listening to music from the speaker, you can charge the speaker if it is connected to the AC outlet. (The CHARGE indicator is not lit.)
However, it is recommended to turn off the speaker for charging because the charging time may become longer.
Note
Charge the battery before use.
When connecting the USB AC adaptor to the speaker for the first time, the
seconds, and then it lights up in red. Unless the
PAIRING button.
Charge the battery before use, otherwise the power will not turn on. If the battery life is low, the speaker is not turned on immediately even when
connected the USB AC adaptor.
Charge the battery at least 1 hour before use.
When the speaker is turned on, the CHARGE indicator is not lit even when the USB AC adaptor is connected. (Charging is started.)
When you switch the power source between an AC outlet and battery by connecting/disconnecting the USB AC adaptor, sound output will stop for
a short while. This is not a malfunction.
If you use the speaker at a high volume, the battery power and the volume may reduce even when connected to an AC outlet. When using the
speaker while charging the battery, turn the volume to low. Or turn off the speaker, and wait until the battery is charged fully.
If you use the speaker at a high volume for a long time, the battery power and the volume may reduce even when connected to an AC outlet. This
is not a malfunction. In this case, turn off the speaker, and wait until the battery is charged fully.
When the battery life is low (CHARGE indicator flashes), the maximum output level of the speaker becomes low.
In a very high or low temperature, charging the battery will be stopped for its safety. If the charging continues for a long time, the charging may be
stopped. Charge the battery in the usable temperature range (5 °C to 35 °C).
If you do not intend to use the speaker for a long time, charge the battery to its full capacity once every 6 months to maintain its performance.
*4
(power) indicator flashes slowly in green for about 20 to 30
(power) indicator lights up in red, the speaker is not turned on by pressing the
*3
(power)/
33