I see a red light flashing when My BURST Toothbrush charges, what does it mean? July 28, 2021 00:46 Updated The red light on your brush will illuminate while charging. When it's done charging, it will turn off. Related articles What’s the battery life on my BURST Toothbrush? How will I know my BURST Toothbrush is charging? Is the charcoal in the bristles of the BURST Toothbrush bad for my enamel? Why is the travel case only included with the Rose Gold edition BURST Toothbrush? Can I use my BURST Toothbrush in the shower?