How to remove battery compartment door

Try a que tip with rubbing alcohol into the battery compartment of the 300s. Rub the terminals with the moistened que tip gently and look for dirt, dust, debris in the compartment.

Yes, the DR-6 Right Angle Viewfinder fits the D300.

Get the battery checked in a nikon customer care. See if the camera works with same nikon battery of the some other person. If not, the problem might lie with the camera. Visit the customer care for repairing it.

my battery sticks because I dropped it down a mountain - no joke - the battery compartment is slightly out of shape - you can't really tell - so the battery sticks in. I just give it a gentle tap and it comes out.

Try sending an e-mail this way. You can call too, but I think the e-mail way takes less time. How did ya lose the battery door? Should I be watchful over the one on my camera?
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Hi Dee and thanks for coming to FixYa.

Hold the camera like your going to take a picture. Now turn the camera over to look at the bottom. On the right hand side is a small latch. The latch secures the battery hatch door. Pop the latch and the battery door should open.
Turn the camera back over carefully and the batter should slide out.
Then plug the battery into the charger and you can charge it. Have fun with your new camera!

Rob

Can you not hold the camera upright and it should fall a little bit to allow you to grab hold of the end and pull it out.

Otherwise it this isn't happening there may be a mechanism problem.

hope this helps.

Drew

on the bottom of the camera, look for a small latch. Open it and a door will swing open. Slide out the battery