# Warning: WHY2025 Badge is a fire hazard **URL:** \ **Category:** Projecten\ **Tags:** english, why2025, badge, fire\ **Created:** [August 5, 2025, 8:49pm UTC](https://forum.revspace.nl/t/warning-why2025-badge-is-a-fire-hazard/684 "2025-08-05T20:49:42Z")\ **Posts on this page:** 12\ **Page:** 2
**Author:** ![pbx](https://forum.revspace.nl/user_avatar/forum.revspace.nl/pbx/32/96_2.png) [@pbx](https://forum.revspace.nl/u/pbx)\ **Post date:** [August 6, 2025, 1:32pm UTC](https://forum.revspace.nl/t/warning-why2025-badge-is-a-fire-hazard/684/21 "2025-08-06T13:32:54Z")
Even then, they might still vent a large amount of gas, and also incandescent components can easily light other materials in the vicinity. Having that happen in a field full of polyester tents doesn’t seem very safe ---
**Author:** ![krekr](https://forum.revspace.nl/letter_avatar_proxy/v4/letter/k/df788c/32.png) [@krekr](https://forum.revspace.nl/u/krekr)\ **Post date:** [August 6, 2025, 1:33pm UTC](https://forum.revspace.nl/t/warning-why2025-badge-is-a-fire-hazard/684/22 "2025-08-06T13:33:50Z")
Afaik that’s another failure mode. My main concern is with the thin 0.2mm traces, secondly the wider horizontal trace. The problem is not the MOSFETs. I don’t think these traces last long under 20A. I doubt they’ll even hold under 4A. That’s why I’m calling them glow wires. Just shorting B+ to GND ‘somewhere’ isn’t enough. It matters a lot _where_ you do it. See the red circles in my screen shots. I also have a nagging feeling there might be more issues but I can’t put my finger on them just yet. ---
**Author:** ![pbx](https://forum.revspace.nl/user_avatar/forum.revspace.nl/pbx/32/96_2.png) [@pbx](https://forum.revspace.nl/u/pbx)\ **Post date:** [August 6, 2025, 1:40pm UTC](https://forum.revspace.nl/t/warning-why2025-badge-is-a-fire-hazard/684/23 "2025-08-06T13:40:41Z")
I shorted B+ to ground at the B+ tab, simulating what would happen if the tolerance issue caused a short. The thin traces are only control traces for the reverse polarity protection, the current here flowed through big fat power planes. ---
**Author:** ![Juerd](https://forum.revspace.nl/user_avatar/forum.revspace.nl/juerd/32/32_2.png) [@Juerd](https://forum.revspace.nl/u/Juerd)\ **Post date:** [August 7, 2025, 8:16am UTC](https://forum.revspace.nl/t/warning-why2025-badge-is-a-fire-hazard/684/24 "2025-08-07T08:16:24Z")
> [**Jonty Wareing** @jonty@chaos.social](https://chaos.social/@jonty) > > For what it’s worth, we made the same error on the [@emf](https://social.emfcamp.org/@emf) 2014 badge using unprotected lipo pouches. Never again. > > That event was only ~1000 people and we had at least three instances of batteries emitting smoke [#why2025](https://chaos.social/tags/why2025) ([Jonty Wareing: "For what it's worth, we made the same error on th…" - chaos.social](https://chaos.social/@jonty/114982750107338682)) ---
**Author:** ![Juerd](https://forum.revspace.nl/user_avatar/forum.revspace.nl/juerd/32/32_2.png) [@Juerd](https://forum.revspace.nl/u/Juerd)\ **Post date:** [August 7, 2025, 9:21am UTC](https://forum.revspace.nl/t/warning-why2025-badge-is-a-fire-hazard/684/25 "2025-08-07T09:21:10Z")
> [@krekr](#): > > The problem is not the MOSFETs. In our short circuit test, the MOSFET was the part that turned into a lighter. ---
**Author:** ![krekr](https://forum.revspace.nl/letter_avatar_proxy/v4/letter/k/df788c/32.png) [@krekr](https://forum.revspace.nl/u/krekr)\ **Post date:** [August 7, 2025, 1:18pm UTC](https://forum.revspace.nl/t/warning-why2025-badge-is-a-fire-hazard/684/26 "2025-08-07T13:18:35Z")
There is some ‘lively’ discussion going on at [HN](https://news.ycombinator.com/item?id=44808423#44809305) ---
**Author:** ![Juerd](https://forum.revspace.nl/user_avatar/forum.revspace.nl/juerd/32/32_2.png) [@Juerd](https://forum.revspace.nl/u/Juerd)\ **Post date:** [August 8, 2025, 8:41am UTC](https://forum.revspace.nl/t/warning-why2025-badge-is-a-fire-hazard/684/27 "2025-08-08T08:41:20Z")
> **[Hackersconferentie WHY waarschuwt voor mogelijk brandgevaar in badges](https://tweakers.net/nieuws/237844/hackersconferentie-why-waarschuwt-voor-mogelijk-brandgevaar-in-badges.html)** > > De badge van de hackersconferentie WHY kan mogelijk brandgevaar opleveren door de manier waarop de batterijen worden geplaatst. De organisatie waarschuwt hiervoor en heeft verschillende maatregelen genomen om problemen te voorkomen. ---
**Author:** ![Juerd](https://forum.revspace.nl/user_avatar/forum.revspace.nl/juerd/32/32_2.png) [@Juerd](https://forum.revspace.nl/u/Juerd)\ **Post date:** [August 11, 2025, 12:13pm UTC](https://forum.revspace.nl/t/warning-why2025-badge-is-a-fire-hazard/684/28 "2025-08-11T12:13:06Z")
The actual cells that are handed out with the badge. ![PXL_20250811_120636633](https://forum.revspace.nl/uploads/default/original/2X/8/86805c9debb015fe70c2a39ab65f148dd56fdaa1.jpeg) ---
**Author:** ![Peetz0r](https://forum.revspace.nl/user_avatar/forum.revspace.nl/peetz0r/32/55_2.png) [@Peetz0r](https://forum.revspace.nl/u/Peetz0r)\ **Post date:** [August 11, 2025, 12:18pm UTC](https://forum.revspace.nl/t/warning-why2025-badge-is-a-fire-hazard/684/29 "2025-08-11T12:18:37Z")
> […] consumers MUST NEVER […] Prachtig 🤣 ---
**Author:** ![Juerd](https://forum.revspace.nl/user_avatar/forum.revspace.nl/juerd/32/32_2.png) [@Juerd](https://forum.revspace.nl/u/Juerd)\ **Post date:** [August 11, 2025, 12:24pm UTC](https://forum.revspace.nl/t/warning-why2025-badge-is-a-fire-hazard/684/30 "2025-08-11T12:24:37Z")
![PXL_20250811_122019801](https://forum.revspace.nl/uploads/default/original/2X/b/b85a591e17e6653e15872a47f392a922902f0fcd.jpeg) I have donated my 18650 cells to Aid to Ukraine at the collection point in their tent. If anyone is not using the cells, or has no safe way of transporting them home, please consider donating them! ![PXL_20250811_122506496](https://forum.revspace.nl/uploads/default/original/2X/3/34367432ec698ddbaf51e657cde0359d2d69e21f.jpeg) ---
**Author:** ![illyau](https://forum.revspace.nl/letter_avatar_proxy/v4/letter/i/898d66/32.png) [@illyau](https://forum.revspace.nl/u/illyau)\ **Post date:** [August 11, 2025, 8:58pm UTC](https://forum.revspace.nl/t/warning-why2025-badge-is-a-fire-hazard/684/31 "2025-08-11T20:58:51Z")
I did the same! ---
**Author:** ![Juerd](https://forum.revspace.nl/user_avatar/forum.revspace.nl/juerd/32/32_2.png) [@Juerd](https://forum.revspace.nl/u/Juerd)\ **Post date:** [August 27, 2025, 5:40pm UTC](https://forum.revspace.nl/t/warning-why2025-badge-is-a-fire-hazard/684/32 "2025-08-27T17:40:32Z")
3 posts were split to a new topic: [Warning: WHY2025 Badge may have hazardous uncured epoxy](https://forum.revspace.nl/t/warning-why2025-badge-may-have-hazardous-uncured-epoxy/701) [Previous page](https://forum.revspace.nl/t/warning-why2025-badge-is-a-fire-hazard/684.md?page=1)