I didn't see this discussed before, so throwing it out there. A while back, it was released that Tesla had patented a battery-battery hybrid (from Metal-Air to Li-Ion) power train. Nothing was ever produced from that tech. Considering that the model 3 doesn't "need" performance, and the Li-Ion battery might cost more per kwh than Metai-Air, would it make sense for the model3 to have a 20kwh Li-Ion battery paired with a 40kwh Al-Air? Giving it 200+ mile range, without supercar performance or cost. Unlike PHEV's, a battery hybrid wouldn't have as much additional weight to haul. Plus, the Al-Air battery can probably be made removable for additional weight savings during commuting days. Or would this tech make more sense for larger vehicles that would most benefit from the extra capacity with minimal additional weight? Like a model S v2?