Chosen Solution
I had 2 batteries. Both the batteries were working alike earlier. I started using my DSLR again after a year. One is working fine. The other, however does not fit into the slot. It does not go completely in and gets stuck which makes it difficult to remove it again. I am not facing any such issue with the other battery. What should I do?
I would replace the battery. It sounds like that battery is starting to fail, and with that, comes swelling.
