Nexus 4 unresponsive and blinking red light when battery at 80%

Tonight, for the second time this week, my Nexus 4 shut down by itself and was unresponsive when I tried to power it up. I had no luck holding the power button. Then I tried plugging it in the computer, still nothing. Then I thought maybe I should try plugging it in the wall with the original wire. While plugged, I held power and volume then the red light flashed a few times just before the phone finally powered up. Then I noticed the battery charging indicating 80%. So it was not that the battery was completely empty. Both times plugging it in the wall with the original charger did the trick but both times, the battery was not empty. Does that indicated a problem with the battery? Should I expect more problems are on the way?