I think I've used this thing three times total. It's basically brand new. Buy with confidence.
This large capacity battery grip is powered by two Battery Pack LP-E6 batteries or an optional DC Coupler DR-E6 and AC Adapter AC-E6N. It features a variety of operating controls, and is ideal for high volume and vertical shooting.
This Canon Bg-e20 Battery Grip is the perfect fit for the EOS 5d Mark IV. This grip will allow you to hold the camera from the battery so that it can be held vertically. It also allows you to activate the shutter release from a vertical position. The vertical position control buttons will allow you to control certain functions of the camera as well. Up to two LP-E6N is able to fit inside of the grip. It also has alignment pin holes that are compatible with different heads.