Never run out of power with the Phottix PPL-200 Power Pack. With available Nikon cables, this power supply can be used to charge two compatible flashes at the same time. The Ni-H power pack can fire a SB-900 approximately 1500 times at full power with a recycle time of 1.5 seconds. Two flash units can be connected at one time and will give you 750 full power flashes. The kit comes with one Nikon high voltage cable. This is the ultimate battery battery pack for event photographers who need to shoot all day and never worry about battery power!!