Canon Battery Grip BG-E18– This is for cameras that uses LP-E17 batteries, including Rebel T6s and Rebel T6i. This can hold 2 LP-E17 batteries. This does not support AA batteries. This has shutter button, Aperture/exposure compensation button, AE/FE lock, and AF point selection button....
Rebel lineup for better differentiation, the 77D is not physically like the rest of the *0D models. So, even though the 77D does not bear a "Rebel" moniker, it is a very Rebel-like camera and basically is to the Rebel T7i what the Rebel T6s was to the Rebel T6i, once again ...