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Proxy N Cell Batteries for HP-41C Calculator — image 1
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Proxy N Cell Batteries for HP-41C Calculator

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Holds the HP-41C battery holder in place by tensioning the springs.

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Model information

Category
Computers
License
Creative Commons — Attribution — Share Alike

Also available on MakerWorld with a profile for Bambu printers.

It is always a worry storing away a 41C: leave the batteries in and risk battery leakage, or, take them out and risk losing the cover. Now you can keep your HP-41C battery cover attached to the calculator with these proxy/placeholder batteries.

These proxy batteries are shorter than real N cells to avoid fully compressing the springs. With all four, there is still plenty of tension to keep the cover securely attached.

I used PC filament as AI tells me that PC is least likely to have any chemical interactions with the battery contacts. AI's second choice is PETG.

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