I have a 2014 S 60 with 50kwh (estimated) usable capacity. Probably one or 2 of my modules has a dodgy cell in it, but even if that is the case, original capacity is only 58KWH usable? Not very much. Does the voltage of each pack differ depending on capacity? As far as I know, each module is about 4.5KWH (assuming no degradation), so I guess the S 60 has 14 modules? And an S 85 has 18 modules? Since there are more cells in the S 85, does that mean the voltage is higher? Does anyone know if there is some empty space in the S 60 packs where you can just insert 4 more modules and basically turn the car into an S 85? Anyone have any experience with this?