One losing charge

[LanceUppercut]

Fitbit One is 3 years old. It went from needing a charge every 2 weeks to needing it every 3 days and now seems confused about its charge and dies after a day. When i plug it into laptop, it thinks it is charged and this is verified on dashboard.
I have checked to see it is updated. I have restarted it. 

[SteveH]

That doesn't sound good. The One can last more than 3 years (mine is getting close to 4) but some do reach end of life sooner rather than later.

There's not really a lot you can do. The only real tool we have is the restart process and although you have tried this it might be worth trying again a few more times as it's known to not always work.

If it's confused about power levels it might also be worth letting it drain completely and then charging it fully. 

[ShaiKingTroy]

After a while, while using the battery a lot it might lower the battery completely. So after 3 years, this is normal. I suggest that you get a new Fitbit, and sell this one on eBay to make back the money