After going through this post(Why does my phone have erroneous input when connected to a non-OEM power source?) I am asking this question the above post does not solve my question up to the mark.
I was at a convenience store where I found a wall mounted charge station. The unit has several types of pins for various brands(Lg , Nokia, Blackberry etc.) When I connected the USB to my device the screen started to flicker and the device started vibrating for some reason for which I had to withdraw the USB Cable from the device.
Specs- Operating system-Android 4.1.2
The unit was perfectly normal as beside there was another blackberry device getting its charge normally. Then why did my device show this behaviour