16EnPreparationThank you for purchasing the Nikon High-performance Battery Pack SD-9. The SD-9is an external power source for the Nikon Speedlight SB-900. You can install four oreight AA-type batteries in the SD-9 to ensure a stable power supply for the SB-900,and can get a greatly increased number of flashes and a shortened recycling time.Please read this user’s manual as well as the manuals provided with your cameraand Speedlight before use.Compatible Speedlight■Nikon Speedlight SB-900Nomenclature■1 324 56781 Tripod socket2 Power cord3 3-pin plug4 Battery case5 Lock release buttons6 Ready-lights7 Soft case SS-SD9 (supplied)8 Camera attach screw(supplied)Usable batteries■Use the same type of four or eight AA-type penlight batteries of any of thefollowing types.Alkaline-manganese (1.5 V) Lithium (1.5 V)Oxyride™ (1.5 V) Ni-MH (Nickel Metal Hydride) (1.2 V)