> Wh/kg figures hasn't changed Maybe I misunderstand you, but taken at face value, this assertion is incorrect. Battery density (Wh/kg) has more than quadrupl

> Wh/kg figures hasn't changed Maybe I misunderstand you, but taken at face value, this assertion is incorrect. Battery density (Wh/kg) has more than quadrupled since the 90s. See e.g. https://rmi.org/the-rise-of-batteries-in-six-charts-and-not-too-many-numbers/ https://rmi.org/the-rise-of-batteries-in-six-charts-and-not-... Price is also dropping fast! The learning rate for Li-ion batteries right now, is around a 35% price reduction for every doubling in installed capacity.