Perhaps you could try some stiff steel shims or judicious use of the point of a scalpel down the side of the battery and housing. I wouldn't tap the housing too hard to try and get the batteries out as it may affect the laser module somewhat. If there is a way to open the other end, then try that and push the batteries out.
Also is it corroded in place or somehow just stuck?
Best
JA
Last edited by JA; 16-02-2021 at 09:09 PM.
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