Nikon D5000 Battery Door Replacement - iFixit Repair Guide
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Kastar 4-Pack EN-EL9a Battery and AC Wall Charger Replacement for Nikon D5000 SLR Digital Camera, D40 SLR Digital Camera, D40X SLR Digital Camera, D60 SLR Digital Camera, D3000 SLR Digital Camera -
Nikon D5000 Digital Camera w/Nikon LIthium Ion Battery Pack (no lens) - Cameras, Photo-Audio-Radio - BMI Surplus
Amazon.com : Wasabi Power Battery (2-Pack) and Charger for Nikon EN-EL9 and Nikon D40, D40x, D60, D3000, D5000 : Digital Camera Batteries : Electronics
Amazon.com : BIG MIKE'S ELECTRONICS BM Premium 2 Pack of EN-EL9, EN-EL9A Batteries and Battery Charger for Nikon D5000, D3000, D60, D40x & D40 Digital SLR Camera : Electronics
Promaster ProMaster EN-EL9a Battery - Nikon D3000 and Nikon D5000 - ASAP Photo and Video