In order to detach a Battle.net Authenticator from a Battle.net account, you need to provide two consecutive authenticator codes and must click the REMOVE AUTHENTICATOR button before the second code expires.
To remove a Battle.net Authenticator, follow these steps:
Log into your account at http://eu.battle.net
Click the ACCOUNT button, located at the top of the page:

To reach the removal page, either:
Click [Remove] at the side of your ACCOUNT SECURITY information:
(or)
In the account navigation menu, click Settings and then select Change Security Options:
Click the REMOVE AUTHENTICATOR button
Generate an authenticator code and enter it into the First Authenticator Code field. Wait approximately 30 seconds before generating a new authenticator code and entering it into the Second Authenticator Code field. Quickly click the REMOVE AUTHENTICATOR button to complete the removal process.
Stormrage
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i cant play i hacked
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Not sure how this works out with the battle pets later.
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many thanks robert kershaw
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Azuremyst