What does 4 flashing red lights mean?

This indicates a general issue or fault within the battery pack itself. The battery's internal electronics may have detected an error that prevents it from operating.

• Internal battery fault
• Battery pack failure

Click steps to track your progress.

1. 1

   Try a different, known-good battery to see if the issue persists.

2. 2

   If the problem is with this battery, it may need to be serviced or replaced.

3. 3

   Contact STIHL customer support for further assistance.