The Phottix PPL-200 Battery Pack can be used with Canon 580EX II, 580 Ex, 550 Ex, 600EX/RT. With available Nikon or Canon cables this power supply can be used to charge two compatible flashes at the same time. Worrying about AA batteries is a thing of the past. The Ni-H power pack can fire a Nikon SB-900 approximately 1500 times at full power with recharge times of 1.5 seconds. Two SB-900s could be fired 750 times.
Phottix PPL-200 Features
Has a high voltage power cord can be used with all Nikon Flash units
Its recycle times is minimized to 1.5 sec at full power
Easy rechargeable Lithium battery
Could easily power two speed lights in single time