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Amazon.com : Phottix Battery Grip BG-D3100 for Nikon D3100 and D3200 : Digital Camera Battery Grips : Electronics
Amazon.com : DSTE Replacement for Pro IR Remote MB-D31 Vertical Battery Grip Compatible Nikon D3100 D3200 D3300 D5300 SLR Digital Camera as EN-EL14 EN-EL14A : Electronics