And there are lots of other sizes too, such as the huge 40135 (40mm x 135mm)

  • dual_sport_dork 🐧🗡️@lemmy.world
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    15 days ago

    This is also true of coin cells, i.e. watch batteries. For instance, the ubiquitous CR2032 is 20mm in diameter and 3.2mm thick. CR2024 is the same but 2.4mm thick, CR2016 is 1.6mm thick, etc.