where DoD refers to the depth of discharge of the battery. The battery is sized using the start-of-life battery efficiency and a DoD of 0.8. For a new truck, the battery is operating between 10% and 90 % state of charge to sustain battery health. However, we switch to a 0% to 100% operation at the end of truck's life to ensure a 600-mile (966 km) range despite the decrease in battery efficiency and capacity fade.