Nissan X-Trail 2017 | Stop - Start System Fault - Easy Fix

Nissan X-trail 2017 | stop start system fault easy fix. So today our car developed a problem. When I tried to start the car I was greeted wit a lot of noise from under the bonnet and all my interior and exterior lights started flickering and the message (Stop - Start System Failure) lit up on the dash. Both my keys were eventually showing as (not recognised) by the vehicle aswell. So after searching for hours in forums for a fix and after trying to problem solve from the Nissan manual I found that the battery was effectively drained and had to charge it. Here's how I did it.