I had the Samsung epic, and it had the same situation. That phone would charge to 95%, and to get the other 5%, you need to charge the phone while it was off. Try that with the nexus, it might be a Samsung thing
Portions of this page are modifications based on work created and shared by the Android Open Source Project
and used according to terms described in the Creative Commons 2.5 Attribution License. AndroidCentral is an independent site
that is not affiliated with or endorsed by Google.