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Physical Collectors "Should Plug In" Switch, 3DS And Vita Game Cards "Every 5-10 Years" To Avoid Data Loss (www.timeextension.com)
submitted 1 year ago by to c/nintendo@lemmy.world
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[–] 3 points 1 year ago

There's some variety, but it's either a 1616, 2025, or 2032. I believe they're all 3V.
The numbers represent the physical size. 1616 is 16mm in diameter and 1.6mm thick.
I didn't realize this before looking it up just now, but they're interchangeable, as long as you can get the battery to physically fit (and watch out for surprise voltage exceptions).

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