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Bose SoundLink Flex Bluetooth® Speaker

Sold from 2021 – present

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Battery will not fully charge

If your system indicates that your battery is charging but never indicates that charging is complete, try the following:

If your product has been in extreme hot or cold temperature, wait until it reaches room temperature.

If the battery temperature is beyond the operating temperature range, wait until the product reaches room temperature, then try again.

Reset your product.

Much like rebooting a smartphone, your product might need to be reset on occasion to correct minor issues. For more info, see Resetting your product.

Check that the USB charger meets the power requirement of your product.

On the USB charger, there will be text that indicates the amp (A) or milliamp (mA) rating of the charger. This rating varies among chargers – including those supplied with different models of Bose products. The closer the amp rating of the charger is to the maximum amp rating of the product, the more quickly the product will recharge. If the amp rating of the charger is too low, the product may recharge slowly or not at all. Refer to the specifications indicated on the product or within it's owner's guide on for details.

Some products require minimum of 1 amp of current in order to recharge. Many USB ports on a computers can only provide a maximum of 0.5 amps of current. Be sure to use a safety-agency-approved power supply that meets local regulatory requirements (e.g. UL, CSA, VDE, CCC).

The following chargers are not compatible with your product:

  • The Bose Portable Smart speaker charger does not work with this product
  • USB docking stations may not provide enough amperage to charge this product

Reseat the USB charging cable on both ends

Disconnect and reconnect the USB cable at both ends, ensuring it is firmly connected. Allow at least an hour for the speaker to charge after the connections have been reestablished.

Try a different USB cable.

Try connecting your product with a different USB cable to determine if there is an issue with the first cable.

Check for and install any available product updates.

Regardless of the issue you are experiencing with your product, try updating it. Visit btu.Bose.com and follow the instructions to ensure your product has the latest features and enhancements.

Your product may need service.

If the steps provided do not resolve your issue, your product may need service. Follow the link below for more information on how to service your product. Depending on your product and region, you will be provided a contact number or the ability to setup service online.

Click here to start service
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