I would imagine that planes could have much higher battery cell per battery pack utilization, because the protective shell for the battery packs is less necessa

I would imagine that planes could have much higher battery cell per battery pack utilization, because the protective shell for the battery packs is less necessary. Some back of the envelope math for the Model 3 battery: it has 4416 2170 cells, 66g each, is 291.5 kg, and the total battery pack weight is 478 kg. So only 60% of the battery pack weight is the actual battery cells.