Chosen Solution
My 2 year old Fitbit lite stopped measuring heart rate, now it’s losing charge in a few hours
If it’s two years old, you need to either replace the watch itself or the battery. As we all know, batteries degrade overtime with charging and daily usage. The batteries in smart watches are microscopically tiny so they have more of a chance of dying quickly. I’m honestly surprised that it’s lasted two years! Usually things like Apple Watches, Fitbits and the lot work fine for about a year till’ they need a battery replacement. Oh, and the reason the heart rate sensor wont work is because the battery is not providing enough power for it to fully function. Unless you would like to replace the battery yourself or get a repair shop todo it, you are much better off getting a new smartwatch and selling this one for parts on eBay so it doesn’t go to landfill. You could also try re-installing FitOS (FitBits Operating System) via the supplied USB cable. Hope this clears up where you should go from here.
