My laptop is a Fujitsu Lifebook T937. It's a second hand laptop I got a few months ago after previously experiencing problems with my MacBook Pro Mid 2012 that unfortunately went unsolved
The first thing I did on this laptop is install iTunes so I could link my iPhone, use my iPhone internet on the laptop and charge the iPhone while linked to the laptop. The strange thing I noticed over time is that when plugged in trough USB, the iPhone will always show the green charging symbol, but it will really charge only with one side of the lightning charger.
When I use the charger to charge through a normal socket in the house, this doesn't happen. Do you know what could cause the issue ?