Hi, I'm really keen on buying a BMW i3 BEV and have test driven 2 used cars within my price range. The first one is a 2015 model with 27,500 km and has a battery kapa max of 17.4 kWh. The second is a 2014 model with only 6,700 km on the clock (possibly ex demo) but has a battery kapa max of 16.5...