The Core SWX Fleet Quantum Quad V-Mount Charger features four charge bays with two independent sidesThe FLEET Quantum is capable of charging four V-mount batteries by utilizing a 2 x 2 rapid charge process. This means the right two and left two bays run independently. When four packs are placed on the charger, it charges one pack from each side with the most charge capacity first, then continues with the lesser-charged packs for the quickest charge sequence. To charge two batteries, you would place one on each side for simultaneous charging. Four 98Wh batteries can be charged in approximately three hours at a rate of 4A per hour, which also utilizes half the power used by previous models.