The MB-D14 battery grip from Newell is designed for the Nikon D600. Powered by an EN-EL15 cell
MB-D10 battery grip from Newell, designed for Nikon D300 / D300s / D700. Powered by an EN-EL3e cell
Battery grip BG-D51 from Newell for Nikon D5100. Powered by an EN-EL14 cell