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> The WHY2025 badge was designed to be powered by 2 Li-Ion 18650 battery cells connected in parallel. The cells provided to visitors are of the "unprotected" ki

> The WHY2025 badge was designed to be powered by 2 Li-Ion 18650 battery cells connected in parallel. The cells provided to visitors are of the "unprotected" kind ...I am going to put on my "client-facing consultant" hat for a moment, which means skipping the expletives, and just say that not only is this a Very Bad Design, it is such a Very Bad Design that someone should really have noticed this and not let it happen. Because this really is a Startlingly Bad Idea.

fjfaase 1y ago
An earlier design by Badge.Team [1] did not use these cells and Badge.Team (no longer associated with WHY2025) strongly advised against the use of these cells. The earlier design has been matured into Konsool [2] and is available as Tanmatsu [3]. [1] https://badge.team/ https://badge.team/ [2] https://badge.team/docs/badges/konsool/ https://badge.team/docs/badges/konsool/ [3] https://nicolaielectronics.nl/tanmatsu/ https://nicolaielectronics.nl/tanmatsu/
- stavros 1y ago
  Why was that advice ignored?
  - eqvinox 1y ago
    WHY2025 orga has been a shitshow on the social & interpersonal level. The badge team was one of the casualties. (And triggers, from what I've heard they weren't paragons either, but that's even more hearsay.) (Source: I'm in c3noc/Internetmanufaktur, though not attending WHY. TBH I saw the shitshow coming and decided I don't need it in my life.)
    - slashink 1y ago
      "WHY2025 orga has been a shitshow on the social & interpersonal level." Curious to learn more as an outsider if you don't mind elaborating?
      - Foorack 1y ago
        Very little information is available, it's all "behind the scenes". Oh, and the entire Team:Warehouse resigned on day 5 of the event.
  - fjfaase 1y ago
    Often it is the case that safety concerns are overruled by less technical savvy managers for some lesser critical reason.
    - ginko 1y ago
      But surely two 18650s are just overkill. I might understand switching from the recommended LiPo cell to a single 18650 for cost cutting reasons (even though that's still probably a bad idea safety-wise), but why two?!
      - seba_dos1 1y ago
        I have a smartphone prototype board right next to me which can be powered entirely from a single (protected!) 18650 cell, and let me tell you that its SoC isn't exactly power efficient. It really seems baffling. I have a bunch of camp badges there too and while some are really fun boards to play with I wouldn't trade safety for longer battery life with any of them.
        MartijnBraam 1y ago
        Hah I also have a smartphone prototype here powered by a single 18650 and I've already seen one of them turn into a smoke machine because the holder has protruding pins and doesn't fit most protected cells... Two 18650s also sounds like it would be heavy for a badge
        userbinator 1y ago
        A single (removable) 2000mAh lipo cell, on the low end of capacity for 18650s these days, was a very common power source for smartphones in the 2010s.

fjfaase 1y ago

An earlier design by Badge.Team [1] did not use these cells and Badge.Team (no longer associated with WHY2025) strongly advised against the use of these cells. The earlier design has been matured into Konsool [2] and is available as Tanmatsu [3]. [1] https://badge.team/ https://badge.team/ [2] https://badge.team/docs/badges/konsool/ https://badge.team/docs/badges/konsool/ [3] https://nicolaielectronics.nl/tanmatsu/ https://nicolaielectronics.nl/tanmatsu/

stavros 1y ago
Why was that advice ignored?
- eqvinox 1y ago
  WHY2025 orga has been a shitshow on the social & interpersonal level. The badge team was one of the casualties. (And triggers, from what I've heard they weren't paragons either, but that's even more hearsay.) (Source: I'm in c3noc/Internetmanufaktur, though not attending WHY. TBH I saw the shitshow coming and decided I don't need it in my life.)
  - slashink 1y ago
    "WHY2025 orga has been a shitshow on the social & interpersonal level." Curious to learn more as an outsider if you don't mind elaborating?
    - Foorack 1y ago
      Very little information is available, it's all "behind the scenes". Oh, and the entire Team:Warehouse resigned on day 5 of the event.
- fjfaase 1y ago
  Often it is the case that safety concerns are overruled by less technical savvy managers for some lesser critical reason.
  - ginko 1y ago
    But surely two 18650s are just overkill. I might understand switching from the recommended LiPo cell to a single 18650 for cost cutting reasons (even though that's still probably a bad idea safety-wise), but why two?!
    - seba_dos1 1y ago
      I have a smartphone prototype board right next to me which can be powered entirely from a single (protected!) 18650 cell, and let me tell you that its SoC isn't exactly power efficient. It really seems baffling. I have a bunch of camp badges there too and while some are really fun boards to play with I wouldn't trade safety for longer battery life with any of them.
      - MartijnBraam 1y ago
        Hah I also have a smartphone prototype here powered by a single 18650 and I've already seen one of them turn into a smoke machine because the holder has protruding pins and doesn't fit most protected cells... Two 18650s also sounds like it would be heavy for a badge
      - userbinator 1y ago
        A single (removable) 2000mAh lipo cell, on the low end of capacity for 18650s these days, was a very common power source for smartphones in the 2010s.