I'm guessing the Calumet batteries do both Canon 1D and the Nikon D3/4, it's just the end caps that are different, perhaps your one was not fitted correctly?
I had a deprived childhood, George, so it keeps me in my comfort zone.
You can't, Jim.
A 1Dx doing what it does best, capturing 37 images of a 300mph Top Fuel Dragster accident (driver fine) in the link below:
http://markjrebilas.com/blog/?p=21971
At the end of the blog post, there is a video where you can see the photographer standing on a little ladder taking the sequence of pictures. A quick check for flying debris and he carries on shooting, great work.
I've just got home with a nice new shiny 1DX to play with....