The Pentax D-BG4 Battery Grip is designed for the Pentax K-7 & K-5 digital cameras. The grip allows you to insert one lithium-ion battery and combined with a second battery in the camera, effectively doubles your shooting time. You can also use the included tray to insert 6 AA batteries into the grip.
The D-BG4 features a vertical release button, depth-of-field preview switch, front and rear e-dials, buttons for exposure lock and autofocus, as well as a green button and ISO button. It is weather-sealed to protect the battery.