The password requirements for battlenet and also World of Warcraft(wow), Starcraft, Diablo and Heartstone is
- Your password must be between 8-16 characters in length.
- Your password may only contain alphabetic characters (A-Z), numeric characters (0-9), and punctuation.
- Your password must contain at least one alphabetic character and one numeric character.
- Your password must not be similar to your account name.
Password requirements rating
Passrequirements.com has given battlenet's password requirements strength a 5 out of 5 locks.