most of the batteries have a 8yr 100,000 gurantee. means they would have a problem.
I sugested drive and enjoy. you son learn that if you fast you will lose miles, i had loads of times where gom said 22 left coming over M62 from manchester get to huddersfield 30 was fun at 0 to never stopped.
its something we worry about as the small batteries were very short . Drive and enjoy the next three tyears, you will enjoy it i did