Nikon EN-EL4 1900mAh Lithium-Ion Battery Pack for Nikon's D300 and D3 Pro DSLR. Charges in approximately 100 minutes.
EN-EL4 Rechargeable Lithium Ion Battery (repl.) For use with MB-D10
Multi-Power Battery Pack (and all D2-Series and D3 D-SLRs). EN-EL4,
combined with MB-D10 Multi-Power Battery Pack, enables 8 fps operation
of D700 and D300; requires MH-21 or MH-22 Quick Charger and BL-3 Battery