Originally Posted by boybi Can I setup two battle.net accounts using only 1 key? 1 for me and another for my son so he will have his own campaign. Nope. As soon as you key it in on one account, its tied to that account. To use 2 battle.net accounts, you need two keys. Oh and when you are prompted to pick a log-in name choose one that will sit well with you. Its permanent and cannot be changed as of the moment.