Many good comments ...
Current M-S battery == 500 kg/100 kWh on 260 Wh/kg cells (investor presentation).
Next-gen 2170 == 380 Wh/kg; => 1.45 more energy dense.
500 kg => 145 kWh.
2500 kg == current driveline mass of a semi, with fuel, radiators, axels, engine, transmission etc.
=> 725 kWh...