2X EN-EL9 Replacement Battery for Nikon D3000, D5000, D40, D40x, D60, SLR Camera | eBay
Battery Vertical Grip, Multi Power Battery Pack for Canon and Nikon – Fotodiox, Inc. USA
Amazon.com: DSTE Replacement for Pro IR Remote Vertical Battery Grip + 2X EN-EL9 Compatible Nikon D40 D40X D60 D3000 D5000 SLR Digital Camera : Electronics