I had that happen on a used n5 I bought.....and this fixed it.

Could help.

http://androidnews.co.in/2013/11/06/...icked-nexus-5/
Sent from my new HTC One M8, N7, Moto X, GTab3 or S2.

Need help with poor battery life? Any device welcome, even tho its an N5 thread. Please specify if on a device other than N5. Lots of info in first 4 posts! >>>>
[Battery Life Help] Troubleshoot Battery Issues Here....and Tips