I too find the start / stop feature very annoying in my 2016 Jeep Grand Cherokee. It is standard on the V6 engine for that year.
I dislike it when I get to my destination and the engine stops when I come to a complete stop, then restarts as soon as I put the vehicle in park to shut it off again!.
Vehicle does have an additional battery for the stop / start. Mine was replaced under warranty at the 1 year mark.