The vertical grip really enhances hand holding and would be desirable even if no battery was used. Holding a camera in an optimal arms-tight- in-to-chest shooting position in portrait mode, with proper control access, is worth the extra cost and slight weight many times over. The only way it is not clearly a superior way of shooting is tripod mounted shooting. It is rare to hear of someone who has tried it and still does not see the value of it. Usually the naysayers have not used them in serious shooting applications.