Overview:

NIKON d2x battery is a high quality rechargeable replacement battery
which can 100% compatible with the OEM d2x battery which can works
with a lot of battery (machine) - d2x, f6.

Specifications:
Chemistry : Li-ion
Voltage : 11.1V
Capacity : 2200mAh
Dimension : 81.28 x 55.8 x 25.4mm
Color : Black
Brand : Nikon

Replacement for battery part:
NIKON EN-EL4

Compatible with camera models:
NIKON COOLPIX D2X NIKON D2H NIKON D2HS Nikon D2X Nikon F6


Do You Know?
It's a common phenomenon that a charged battery will eventually lose
its charge if unused. Therefore,it may be necessary to recharge your
Nikon D2X battery after a storage period.
Li-ion batteries produce the same energy as NiMH batteries but weigh
approximately 35% less. Today,a rechargeable D2X Li-ion digital camrea
battery should be more popular than a NiMh one for its lower weight.
Very hot or cold conditions can affect a battery's performance and in
some cases can even cause permanent damage.Keep in mind that a Nikon
D2X digital camera battery should be stored in a cool,clean,dry place
when it is not in use.If possible,keep your rechargeable D2X battery
in the car with the heater or cooler running until you need it, and
return it to these conditions as quickly as possible when you're done
shooting.
Don't overcharge your D2X Nikon digital camera battery .Especially
with older technologies,it's good idea to avoid overcharging your
batteries.

reference:
http://www.power-batteries.net/digit...nikon/d2x.html

http://www.laptop-battery-inc.co.uk/.../nikon-d2x.htm