Notes On Charging - Sony ULT FIELD 1 Help Manual

Help Guide
Wireless Speaker
ULT FIELD 1

Notes on charging

Life span of the built-in lithium ion battery
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.
If the speaker is not used for a long time, it may take longer to charge the built-in battery.
The rechargeable built-in battery has a life span. As time passes and the number of times that the built-in battery is
used increases, the capacity of the rechargeable built-in battery slowly decreases. When the amount of time that the
built-in battery can be used seems significantly shorter, despite having been fully charged, contact your nearest Sony
dealer.
When the amount of time that the built-in battery can be used seems significantly shorter, it could mean that the
rechargeable built-in battery has expired.
The life span of the rechargeable built-in battery differs depending on the usage, environment, and storage method.
Caution
When the speaker detects an abnormality in the interior temperature or in the built-in rechargeable battery, the CHARGE
indicator (orange) flashes quickly.
If an abnormality is detected, disconnect the USB cable, wait for a while, and then restart the speaker (by pressing and
holding the (power) button for about 10 seconds). If the problem persists, contact your nearest Sony dealer.
Note
Charging time varies depending on built-in battery usage conditions.
Charge the speaker in an ambient temperature between 5 °C and 35 °C (41 °F and 95 °F). Be aware that the room temperature
may fall to 5 °C (41 °F) or lower depending on the season, for example, especially in wintertime.
The speaker becomes warm during charging. This is not a malfunction.
Avoid exposure to rapid temperature change, direct sunlight, mist, sand, dust, or mechanical shock. Also, never leave the speaker
in a car parked in the sun.
As long as the speaker is connected to an AC outlet by a USB AC adaptor (commercially available), the speaker's built-in battery
is capable of charging itself even while the speaker is turned on. 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.
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