I used to work for McMurdo, and can confirm that theirs can be returned for the battery to be replaced.
Obviously there is a charge for doing so, but at least it's then a saleable item.
If you really don't want to get the battery replaced then I'd suggest a call to the manufacturer anyway. I know they would rather take it back and deactivate it than have it go off accidentally when an inexperienced recycling oink tries to take it apart.
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