Camera Batteries

I got a card reader for my camera so I can get pictures off of it. I have a couple of times taken the battery out and taken it to the store to try to get pictures made. So I did take out the battery first and try to find a slot where it would fit. I couldn't find a place in my new card reader that it would fit.

In my defense, my battery doesn't look like the one in the picture. It's flat and only about 8 times bigger than the card.