About Battle.net Balance Card Gift Card (US) Battle.net registration is required. Note: Battle.net Gift Cards can only be redeemed to user accounts registered in the UNITED STATES. Fill your Battle.net Balance, then use it for games from Blizzard Entertainment, character services, in-game items, and more. Battle.net balance is simple and easy to use. Use Battle.net Balance to purchase World of Warcraft realm transfers and other paid services, as well as digital versions of Blizzard games such as Overwatch, Hearthstone, Heroes of the Storm, World of Warcraft, Diablo III and StarCraft II. You can also use Battle.net Balance to purchase items in games like World of Warcraft and Hearthstone.