Once when I was replacing the batteries in my Angelgotchi I accidently put one in the wrong way and the screen was blank exept when you pressed a button, then the little charecter would show up for a brief 3 seconds then the screen would go blank again. This made playing the shooting stars game verry dificult since I could not see the star that I was supposed to jump over. The little angel kept on ageing like normal. Then my friend who just got her morino that night was looking at some of the morino instructions and they said that both batteries had to be in plus side up, so I opened it back up, checked the batterie and I fixed it. It was fine after that but it was a horrible experience, I thought that my darling angel was going to be like this forever!