Why is my ping higher when my charger is plugged into my Dell Precision M6800 laptop?

I recently noticed that the reason my Wi-Fi was so terrible seems to be caused by plugging in my charger.

Here is a little video of it happening, trying to ping riot.de

Here is the ping when plugged in:

And here, when it isn't:

What could be causing this issue ?

I tried updating my Wi-Fi drivers and resetting my power settings, to no avail. I am running Windows 10 and using a Dell Wireless 1550 802.11ac.

Here are the main power settings:

Just got similar result after testing it within the Windows sandbox (Which should put aside the problem behing cause by bloatware, right ?).

First plugged in, then not:

UPDATE

Tried a few other things:

• Using a different network, (in this case, the school one), gave similar results
• Pinging other website (youtube.com and reddit.com) gave similar results
• Pinging someone else on the same network gave similar results
• Using a new charger

Since ethernet works fine, it is most likely some sort of interference with the wireless signal caused by the charger and/or the charging process. This can be the case if the charger (or the laptop components involved in the charging process) gives out signal interfering with the WiFi signal and or the antenna of your Wifi module within your laptop.

The second scenario is an actual interference of the antenna not introduced by an "outside" frequency (that goes through the air) but through interference that reaches the antenna through the laptop's circuits.

The third scenario, possible though unlikely is that Wifi signal is fine but the controller itself does not work properly when the Laptop charges.

Either way there is need of further testign to determine the acutall cause of for the source of the delay.