Q: What can I do if my ULTIMATE EARS BOOM turns off with a “Critical Battery” message even though it is fully charged?

A: If your ULTIMATE EARS BOOM turns off with a “Critical Battery” message even though it’s fully charged, it’s usually due to a temporary problem where the charge can’t be detected. Here’s how to resolve it:

  1. Plug your speaker into a USB port on your computer using the supplied USB cable.
  2. Turn your ULTIMATE EARS BOOM on.
    NOTE: Your operating system may install USB software automatically.
  3. Disconnect your ULTIMATE EARS BOOM from your computer.
  4. Turn your ULTIMATE EARS BOOM off and then back on.

Your ULTIMATE EARS BOOM battery error should now be corrected.