Makita · DUR190/DUR191 Trimmers
When you press the check button on the battery cartridge, if all indicator lamps are blinking, it suggests a potential malfunction with the battery itself.
Click steps to track your progress.
Remove the battery cartridge from the tool.
Try charging the battery again to see if the issue resolves.
If the issue persists, try a different, known-good battery cartridge.
If other batteries work, the blinking battery may need to be replaced.