I'm asking for help for an Acer laptop so I'm just going to clarify if it actually has a battery life problem. Here goes. After charging for nearly 5 hours, my battery remains capped at 82% and is unable to be charged further.. Despite many hours of continuous charging with it off, it's still unable to be fully charged. It's still under warranty. What could be the problem? 
Any help is greatly appreciated!
Any help is greatly appreciated!