No power on half battery

[Nitnat]

The last few weeks my One has been dying on half a battery.  I have to then restart it by holding the on button.  I've stopped getting the email to say charge up.  I'm loosing a days at a time. Anyone got any suggestions on how to resolve this. Thanks 

[WendyB]

How old is it? They do not last forever.

But try these steps and see if it helps

Please clean the contacts
http://help.fitbit.com/articles/en_US/Help_article/My-tracker-s-battery-isn-t-charging/?q=not+chargi...

Then Do a Restart
http://help.fitbit.com/articles/en_US/Help_article/1186/?q=restart&l=en_US&fs=Search&pn=1

Also See this thread for charging best practices. If you are not charging it correctly you could be damaging the battery
https://community.fitbit.com/t5/Charge/Fitbit-charge-battery-problems/m-p/1323307#M53291

http://help.fitbit.com/articles/en_US/Help_article/1799

If that does not help contact support
http://help.fitbit.com/?cu=1