Does comparing the specs of Powerwall 1 against Powerwall 2 tell us anything useful about the Model 3 battery and 2170 cells? Dimensions (L x W x D) PW1: 52.1" x 33.9" x 7.1" (130cm x 86cm x 18cm) => 201,240 cm3 PW2: 44" x 29" x 5.5" (115cm x 75.5cm x 15.5cm) => 134,578 cm3 Based on the above, PW2 is 60% the volume of PW1, but with 1.4x the total storage (14kWh vs 10kWh) and just a 10% increase in weight. The PW2 "buffer" is 66% smaller as well (0.5kWh vs 3kWh for PW1) giving more available power. PW2 also has 5kW continuous (7kW peak) vs 2kW continuous (3kW peak), suggesting the new cells can support a higher discharge rate, or the BMS strategy for the original cells was more cautious. If the same factors were applied to an 85 battery, that would give a 119 kWh battery with ~112kWh usable. Assuming the M3 battery is physically 30% smaller than the current MS/MX (30% is taken from comments on an investor call last year, maybe someone has real data?), that gives a maximum 84kWh battery with about 78kWh available. Happy to be corrected on any of the above!