Inserting Batteries

The first step is putting batteries into the camera. Please follow the procedure below:

1. Turn Off the Camera
   Turn the mode dial to the OFF position.
   Turn the mode dial to OFF

2. Open the Battery Cover
   Turn the camera upside down. If the camera is on a tripod, detach the tripod before installing batteries because the tripod blocks the battery bay. Slide the latch to the open position to open the battery bay door (see the figure below).
   Open the battery cover

3. Insert Batteries
   Insert the batteries with the positive (+) and negative (-) poles aligned as show in the diagram at the entrance to the battery bay (see the figure below).
   Insert batteries

4. Close the Battery Cover
   Close the cover, and slide the latch back to lock the cover.

Since digital cameras are very power consuming, instead of four batteries you might want to consider the use of external powerpacks or Nikon's EH-31 AC Adapter. Note that 950's AC Adapter EH-30 cannot be used with 990. To use external power, flip open the plastic cover adjacent to the Nikon 990 label as shown in the left figure below. Plug the core from an external powerpack or from the EH-31 AC Adapter into the connector (right figure below), and then you can operate the camera as usual.