Nikon D40 Battery Grip, Camera Battery Grip for Nikon D40

Nikon D40 Battery Grip - It is equipped with an infrared vertical-grip shutter release button to enable shooting in the same fashion as a horizontal grip. But before you use the shutter release button on grip, you should set the camera release mode to 'Quick-response Remote' or 'Delayed Remote'. Nikon D40 battery grip can hold two Lithium-ion battery packs EN-EL9 or EN-EL9a. The D-SLR Camera Battery Grip for Nikon D3000 / Nikon D5000 / Nikon D40 / Nikon D40x / Nikon D60

Battery Type: Nikon D40
Power Source: EN-EL9/EN-EL9a battery pack
Net Weight: 154g(not including battery packs)
Dimensions: 128.67x104.20x79.60mm

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the use way of Nikon D40 Battery Grip: