Neewer&reg; Professional Replacement Camera Battery Grip Pack for VG-C77AM Works with NP-FM500H Batteries for Sony Alpha SLT A77 A77V and A77 II This is a professional vertical battery grip for Sony Alpha DSLR- A77 / A77V, compatible with original Sony VG-C77AM,that can hold one or two NP-FM500H. Batteries. Smart teleconverter button/Focus Magnifier button. AEL/SLOW SYCN/Image index button. Grip control ON/OFF swicth. Compatible With: Sony VG-C77AM.