The charge/assist gage displays the charge into and out of the battery.

When the electric motor is assisting the engine as in a maximum acceleration, the needle moves to the ASSIST range. When the electric motor operates as a generator to perform regenerative braking while decelerating, the needle moves to the CHARGE range. See Regenerative Braking for more information. The needle also moves into the CHARGE region if the hybrid control system deems it is an efficient time to charge the hybrid battery. This may occur when the vehicle is coasting. If the hybrid battery or other hybrid components are very hot or cold, the CHARGE and ASSIST functions may be suspended until the component temperatures are normal.