Notes on charging

Life span of the built-in lithium ion battery

  • The rechargeable battery has a life span. As time passes and the number of times that the battery is used increases, the capacity of the rechargeable battery slowly decreases. When the amount of time that the battery can be used seems significantly shorter, despite having been fully charged, contact your nearest Sony dealer.
  • The life span of the rechargeable battery differs depending on the usage, environment, and storage method.


When the speaker detects a problem for the following causes while charging the battery, the CHG (charge) indicator (orange) turns off even if charging is not completed.

  • Ambient temperature exceeds the range of 5 °C – 35 °C (41 °F – 95 °F).
  • There is a problem with the battery.


  • Charging time varies depending on battery usage conditions.
  • Charge the speaker in an ambient temperature between 5 °C and 35 °C (41 °F and 95 °F).
  • The speaker becomes warm during charging. This is not a malfunction.
  • If the speaker is not used for a long time, it may take longer to charge the battery.
  • Avoid exposure to rapid temperature change, direct sunlight, moisture, sand, dust, or mechanical shock. Also, never leave the speaker in a car parked in the sun.
  • A speaker that is in use can be charged if it is connected to a booted computer or AC outlet via a USB AC adapter (not supplied). In this case, it may take longer to charge the battery depending on the conditions of use. Therefore, it is recommended to turn off the speaker when charging.
  • If charging takes a long time, it makes charging of the speaker stop. In these conditions, the CHG (charge) indicator keeps flashing in orange quickly, but this is not a malfunction. To resolve these issues, disconnect the USB cable from the speaker and connect it again.