Canon Battery Grip for Eos Cameras
By Canon USA

Canon Digital Cameras: - EOS 20D - EOS 20Da - EOS 30D - EOS 40D - Controls: - Additional Shutter Release - Main Dial - AE lock/FE lock - AF Point Selection - Product Type: Camera Battery Grip - Product Model: BG-E2N - Dimensions: 4.4" Height x 5.6" Width x 3" Depth - Mount Type: Vertical ... 

MB-D80 Multi-Power Battery Pac
By Nikon

Nikon D80 Digital Camera - Controls: - AF-on button - Vertical firing release with lock - Front and rear command dials - Product Type: Camera Battery Grip - Product Model: MB-D80 - Features: Allows Extended Shooting - Batteries: 2 x EN-EL3e Lithium Ion (Li-Ion) Supported - 6 x AA Supported ... 

Battery Grip for The K200D
By PENTAX

Pentax K200D Camera - Controls: Shutter release button - Product Type: Camera Battery Grip - Product Model: D-BG3 - Batteries: 4 x AA Lithium Supported - - ...