The BG-E21 Battery Grip for Canon EOS 6D Mark II from Canon is a battery grip designed for use specifically with the Canon EOS 6D Mark II digital SLR camera and accepts one or two Canon LP-E6 batteries. With two batteries installed, your shooting time is effectively doubled. Moreover, when one battery is drained, it can be removed and recharged while you continue shooting with the other battery.

The BG-E21 comes with an alternate shutter release button, AF start button, AF point selection button, AE lock/FE lock button, multi-controller, multi-function button and main dial to facilitate shooting when held vertically.