Acer SF514-52 Charger connecting and disconnecting by itself

GEVA

My charging cable keeps connecting and disconnecting by itself, so it is constantly beeping and going into power-saving mode.
It does not work for me to have the computer unplugged since it does not give me any time to plug it in when the low battery notification comes on, just beeps *shows critically low battery* and goes into hibernation within 10 seconds. 
I am using this computer daily in an environment where this beeping is highly frowned upon and it is truly driving me mad listening to this day in and day out.

The charging cable is fine and there is nothing inside the charging plug that should be the cause of this, the computer is out of warranty as well so taking it to the store is not an option. 
The computer is placed on a desk and there is no pull on the cable and has never been, I have tried to turn off the sound, it does not seem to be a possibility, also it does not save me from the screen constantly going dark.

[Edited to add model name]

Commodore_1995#

What is the exact model? Example 

SF315-52-81HD