This item is an accessory. It must be rented with a non-accessory item.
Nikon SD-9 High-Performance Battery Pack shortens flash recycling time by as much as 60% to 75% and more than doubles flash capacity. SD-8A can be powered by regular Alkaline as well NiMH rechargeable batteries. It can be used with the SB-910 & SB-900 Speedlights.
Please note this battery pack must be rented along with a flash or other gear and not as a single item in your cart.