-See BLIZZARD.COM/SUPPORT/BALANCELIMITS for balance limit and other restrictions.
1-Redemption
Go To blizzard.com/code
Create a FREE Blizzard account.
2-if you already have one, log in.
Enter the code into the field provided.
3-Your Blizzard Balance is now charged and ready to spend on your Blizzard Games(s) of choice.