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 on the N5...or any device really? Lots of info in first 4 posts! >>>>
[Battery Life Help] Troubleshoot Battery Issues Here....and Tips