The VG-XT3 Vertical Battery Grip benefits shooting in the vertical orientation and also accepts two additional NP-W126S rechargeable lithium-ion batteries for extended shooting times. In terms of its physical design, the extended shape incorporates a secondary shutter release button as well as a focus lever, AE-L button, AF-L button, front and rear command dials, Q button, and Fn button to mimic the camera's own layout for intuitive handling. 

FUJIFILM VG-XT3 Specs