If you turn off the tool with the battery still inserted, the tool LEDs will behave as follows:
The Bluetooth LED will remain illuminated for 5 minutes as long as your tool is still connected to your smart device.
The LED Speed Indicator will remain illuminated for 5 minutes to show the last set speed setting.
The Red Warning, Battery Life and Dremel Logo LEDs will remain illuminated for 30 seconds.
To turn off all LEDs, turn off the tool and remove the battery pack.