I have recently found a Tamagotchi Angel and have no clue what kind of batteries it takes. It isn't the same size as the tamagotchi connection batteries, and this guy needs two.
When I buy batteries I get like Energizer or Duracell - it doesn't say LR44 on the front, but it will say it on the back of the package in small print. They are small fat batteries so I just find the ones that look about the size and check the back to make sure they say they will fit LR44