The MB-D10 is a battery pack designed for use with the Nikon D700, D300S and D300 cameras. Unlike battery packs for earlier DSLRs from Nikon, the MB-D10 screws on to the camera without the need for taking the battery door off the camera.
Battery
Load the MS-D10EN tray into the MB-D10 and slide two charged EN-EL3 batteries into the MB-D10. Line up the battery pack with the bottom of the camera and rotate the dial to screw it in. Turn on the camera as you normally would. The MB-D10 also has a vertical-orientation shutter button so when you shift the camera to shoot vertically, you don't have to make an awkward reach to the normal shutter button to shoot.
AA Batteries
When used with the MS-D10 battery tray, the MB-D10 will run on eight AA batteries of any type, including lithium AAs and nickel-metal hydride rechargeable AAs, which last longer. This will also increase the frame rate of your D700 or D300 to eight frames per second.
EN-EL4A
Increase the frames per second of your Nikon D700 from five frames per second to eight, or the range of your D300 from six frames per second to eight, by using the MB-D10 in conjunction with the EN-EL4A rechargeable camera battery and the BL-3 battery chamber cover. The EN-EL4A also requires either the MH-21 or MH-22 Quick Charger, instead of the charger supplied with your camera.
Tags: frames second, battery pack, frames second eight, into MB-D10, Nikon D700, second eight, shutter button