Sony ULT FIELD 1 Help Manual page 11

Table of Contents

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 of the speaker may 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.