Amazon.com : Wasabi Power Battery (2-Pack) and Charger for Nikon EN-EL9 and Nikon D40, D40x, D60, D3000, D5000 : Digital Camera Batteries : Electronics
BATTERY GRIP-D40
Nikon - D40X SLR Digital Camera Battery | Complete Battery Source
Kastar 4-Pack EN-EL9a Battery Replacement for Nikon EN-EL9 EN-EL9a Battery, Nikon D5000 SLR Digital Camera, D40 SLR Digital Camera, D40X SLR Digital Camera, D60 SLR Digital Camera, D3000 SLR Camera - Walmart.com
CameronSino Battery for NIKON DSLR-D40 DSLR-D40A DSLR-D40C DSLR-D40X D5000 D40 D3000 fits NIKON EN-EL9 Digital camera Batteries - AliExpress
Chargeur EN-EL9 EN-EL9A EN-EL9E pour Nikon D40, D40x, D60