I had to replace the battery in our fridge and couldn't get the carrier out. After trying to use a small screwdriver and failing, I bought a replacement gas igniter.
The downside was that the fridge was difficult to remove. Once it was out though, replacing the gas igniter was easy.
I discovered I couldn't get the battery out because the thin metal connection on the carrier's base had bent and jammed the whole thing. I don't think they are very well designed.
Alan