EN-4 Battery for Nikon D1 D1H D1X Camera : Electronics - Amazon.com
Nikon D1X & Nikon D1H - Digital Still SLR cameras
Nikon D1X battery: what are the options?
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Amazon.com : EN-4 Battery for Nikon D1 D1H D1X Camera : Electronics
Review: PowerSmart battery for the Nikon D1 (EN-4 compatible), by Lewis Collard