The Hahnel Innovative Accessories HC-50D Infrapro BatteryGrip is designed for the Canon EOS 50D, 40D, 30D & 20D digital cameras. The grip allows you to use with 1 or 2 Li-Ion batteries, even if they have different charge levels. You can also use the AA battery tray to power your camera with Ni-MH or alkaline AA batteries. Camera handling is improved with a lower point of gravity with the BatteryGrip in place, especially when long focal lenses are used.
The BatteryGrip also features a vertical shutter release that makes shooting with the camera in a vertical position just as comfortable as shooting horizontally. The BatteryGrip has a built-in infrared receiver. This is specially designed for digital SLRs without an integrated infrared remote receiver. The included Infrared remote control can be used to activate this built-in receiver up to 39' (12m) away. The remote control transmitter provides autofocus before shutter release and continuous shutter release or bulb function for as long as the button remains pressed.
Use 1 or 2 Li-Ion batteries, even if they have different charge levels
Use Ni-MH or alkaline AA batteries to power your camera