Abstract: A system for supplying fluid to a battery, a vacuum source, a vehicle, a combination, a method for supplying fluid to a battery and a method of charging a battery. The fluid supply system supplies fluid to a battery in a vehicle, the vehicle including a frame supporting the battery, the battery including a battery cell, fluid being transmittable to the battery cell. The system is defined as including a hydraulic circuit connecting the battery to a tank. The hydraulic circuit is defined as including an inlet conduit connectable to tank, an outlet conduit connectable to the battery cell, and a vacuum source connectable to the battery cell and to the tank. The vacuum source is defined as including a pump having a pump inlet conduit connectable to the tank, and a pump outlet, and a venturi having a first inlet connectable to the pump outlet, a second inlet connectable to the battery cell, and a venturi outlet is connectable to the tank.