Canon BG-E2N Battery Grip for 20D / 30D / 40D / 50D
The Canon BG-E2N Battery Grip for 20D, 30D, 40D, 50D attaches to the bottom of the camera and, with a spare battery in conjunction with your in-camera battery, provides the shooter much longer shooting times. It also can provide the shooter with a better ergonomic grip on the camera body. If you run out of battery power, you can use 6 x AA batteries as backup with the optional AA tray.
The following cameras are compatible with this grip:
There is no manual for this product.