So I bought a Dell Inspiron 15 5000 Series around Christmas time and this problem is getting very annoying. Basically My plug becomes lose sometimes and falls out without me noticing. When I do notice I get the "Your computer''s at XYZ% You might want to plug it in". So of course I plug it in. One night before  I went to bed I plugged in my laptop and peacefully went to sleep. When I woke up I noticed that my laptop hadn't charged because I checked the battery and it said "Plugged in, not charging" . Help please I need my laptop in the morning and got a presentation due, so I don't want my laptop dying in the middle of the presentation(you know how embarrassing that would be...?)

Oh and whenever I plug in my plug again I get this message

The AC power adapter type can't be determined. You system will operate slower and battery will not charge. This problem might be solved by: 

-Ensure the plug is inserted completely for best system operations.

-Connect a Dell 45W AC adapter or higher.