Battery problem?

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Jan 9, 2010
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Hi,

I just purchased a Casio CTK 4000 and am really enjoying it. However, when I set up a registration it worked fine until I shut the keyboard down and detached the adapter. Everything was lost. Is this a problem with an internal battery? I have a wk 3000 at home and there is no problem with it.

Thanks for your response.
 

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