I've had a Sena Impulse for about 2 years now and about 6 months ago it started having issues with charging and, I would guess, firmware issues. When I charge the helmet from any source, I have to reset the helmet (hold down the top 3 buttons until the light turns white) to get it to do anything. I can then use it normally. Now, however, I suspect it's not charging properly as I used it today for about 1.5 hours and it started telling me low battery. I used to get 6-7 hours out of it. I have tried factory resetting it, but it didn't change anything. I suspect a bad firmware, but as it seems to lock up before it can update any firmware, I'm at a loss. Any assistance would be appreciated.