Amazon.com: Synergy Digital Camera Battery, Works with Nikon D6 DSLR Digital Camera, (li-ion, 10.8V, 2800 mAh) Ultra Hi-Capacity, Compatible with Nikon EN-EL18 Battery : Electronics
Amazon.com : BM Premium EN-EL9, EN-EL9A Battery for Nikon D5000, D3000, D60, D40x & D40 Digital SLR Camera : Electronics