How do you open a tamagotchi hexagontchi so you can put batteries in it?

There are two holes with buttons in them on the back of the tamagotchi. The bottom one resets the tamagotchi. The top one opens the battery cover. You need something small enough to fit in the hole(like a paperclip, toothpick, etc.) Press the button and then you will be able to slide the battery cover off.