Vivitar Deluxe Power Grip for Nikon D3100 DSLR

The Vivitar PG-D3100 Deluxe Power Grip holds 2 EN-EL14 batteries, providing twice the power. The Power Grip provides a vertical shutter release button. This option makes shooting with the camera in a vertical position just as comfortable as shooting horizontally. The Power Grip attaches through the tripod mount on the bottom of the camera.