sometimes when you connect alot with your Tamagotchis, that can waistes batteries too. Sometimes when you reset your tamagotchi, it might start all over. (im not trying to get bad Karma)
A tama mini is a Tamagotchi (but small) that you can play with. you can play games. and feed it. A Angelgotchi is kinda different then the mini tama. you can feed it different food. and play different games. and turn off the lights. and give it deeds.