Charging the speaker
The speaker is capable of running on power either from an AC outlet connected by a USB AC adaptor (commercially available) or from the rechargeable built-in battery.
When using the speaker for the first time, be sure to charge the built-in battery for more than 1 hour before turning on the speaker.
With the built-in battery charged in advance, you can use the speaker solely with battery power.
- Connect the speaker to an AC outlet to charge it.
Connect one end of a USB Type-C® cable to the DC IN 5V port on the speaker and the other end to a USB AC adaptor (commercially available), and then connect the USB AC adaptor to an AC outlet.
The speaker supports a USB AC adaptor with an output current of 500 mA or more. Use of any other devices is not guaranteed for battery charging.
The CHARGE indicator lights up in orange while charging is in progress.
The estimated charging time varies depending on the power output capacity of the connected USB AC adaptor (commercially available). In addition, it may take longer than the charging time stated below depending on the type and specification of the USB AC adaptor and USB cable. The charging time may differ from the time stated below depending on the ambient temperature or the usage of the speaker as well.
The following time is stated as a reference.
When a commercially available USB AC adaptor capable of delivering an output current of 500 mA or more is connected, charging completes in about 4 hours and 30 minutes* and the CHARGE indicator turns off.
When using a commercially available USB AC adaptor, make sure that it is capable of delivering an output current of 500 mA or more.
* Time that is required to charge the empty built-in battery to its full capacity when the speaker turns off.
After you disconnect the USB cable from the speaker upon completion of battery charging, be sure to close the cap securely.
The cap plays a very important role in maintenance of the waterproof and dustproof performance.
Checking the charging completion
If the built-in battery is fully charged when you connect the speaker to an AC outlet with a USB AC adaptor (commercially available), the CHARGE indicator lights up in orange then turns off after about 1 minute.
When using the Android smartphone with OS 8.1 or later installed
When the speaker is connected with the Android smartphone via an HFP (Hands-free Profile) BLUETOOTH connection, tap [Settings] - [Device connection] - [Bluetooth] on the smartphone. The remaining battery power of the speaker is displayed along with the connected BLUETOOTH device name. For details, refer to the operating instructions supplied with the Android smartphone.
Note that the remaining battery power displayed on the smartphone may vary from the actual remaining battery power of the speaker. Consider this information as a reference.
When using the iPhone/iPod touch with iOS 10.0 or later installed
While the speaker is connected with the iPhone/iPod touch via an HFP (Hands-free Profile) BLUETOOTH connection, the remaining battery power of the speaker is displayed on the widget screen of the iPhone/iPod touch. For details, refer to the operating instructions supplied with the iPhone/iPod touch.
Note that the remaining battery power displayed on the iPhone/iPod touch may vary from the actual remaining battery power of the speaker. Consider this information as a reference.
Built-in battery life (using a BLUETOOTH connection)
About 16 hours
The volume level of the speaker is set to 26.
About 5 hours
The volume level of the speaker is set to maximum (31).
The built-in battery life above is measured using our specified music source.
Actual performance time may vary from the listed time due to the volume, songs played, surrounding temperature, and usage conditions.
When the built-in battery is running low
When the CHARGE indicator starts flashing slowly, the built-in battery is running low and needs to be charged.
If the CHARGE indicator flashes in orange 3 times and goes out when you turn on the speaker, the built-in battery is empty and needs to be charged.
You can charge the speaker's built-in battery by connecting the USB cable connected with the speaker to a computer that comes equipped with a USB charging port as well. However, not all the computers are tested and found compatible with this procedure and the procedure is not applicable to home-built computers.
As long as the speaker is connected to an AC outlet by a USB AC adaptor (commercially available) or to a computer that comes equipped with a USB charging port, the speaker's built-in battery is capable of charging itself even while music playback from the speaker is in progress. However, it may take a long time before charging completes depending on the usage of the speaker. It is recommended that you turn off the speaker before battery charging.
Depending on the type or specifications of the USB AC adaptor, if you use the speaker at a loud volume, the remaining power of the rechargeable built-in battery may decrease or the speaker may turn off even while the speaker is connected to an AC outlet by the USB AC adaptor. This, however, does not indicate a malfunction. If such a case occurs, turn off the speaker and let the battery fully charge itself before you use the speaker.
The maximum power output will be lower when the built-in battery is running low.
In an extremely cold or hot environment, charging stops for safety. If charging takes a long time, it also makes charging of the speaker stop. To resolve these issues, disconnect the USB cable, and then connect it again within an operating temperature between 5 °C and 35 °C (41 °F and 95 °F).
Do not charge the speaker's built-in battery in places where water may splash on it. The supplied USB Type-C cable as well as the USB port behind the cap are designed neither for waterproof nor for dustproof.
Even if you do not intend to use the speaker for a long time, charge the built-in battery sufficiently once every 6 months to maintain its performance.
When the Android smartphone is configured to use only A2DP (Advanced Audio Distribution Profile) for establishing BLUETOOTH connections, the remaining battery power of the speaker is not displayed on the smartphone.
While the Stereo Pair function is in use, the remaining battery power of the speaker with a BLUETOOTH connection is displayed. The remaining battery power of the other speaker is not displayed.