1.9 was sort of an average from googling. This seems like the most detailed source which has a slightly higher number. https://insideevs.com/tesla-semi-truck-ba

1.9 was sort of an average from googling. This seems like the most detailed source which has a slightly higher number. https://insideevs.com/tesla-semi-truck-battery-is-how-big/ https://insideevs.com/tesla-semi-truck-battery-is-how-big/ 600 is just random googling of what is a long but not super long day for most truck drivers.