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A comment on Fire hazard of WHY2025 badge due to 18650 Li-Ion cells. Parent comment

Re:Fire hazard of WHY2025 badge due to 18650 Li-Ion cells by stonogo on Friday August 08, 2025 @10:52PM (#44843689)
Watch cells are also usually lithium. I'd have just gone with LiFePO4 18650 cells.
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Re:Fire hazard of WHY2025 badge due to 18650 Li-Ion cells by amluto on Saturday August 09, 2025 @01:04AM (#44844148)
Huh? A little CR2032 or similar cell has minimal short circuit current. A LiFePO4 18650 may not set itself on fire if shorted, but it could still set the rest of the badge or your shirt on fire.
[ Parent | on HN ]
Re:Fire hazard of WHY2025 badge due to 18650 Li-Ion cells by aetherspawn on Saturday August 09, 2025 @01:04AM (#44844149)
That doesn’t solve the issue because the fire risk is due to short circuit. Any battery that is Li-based has too low IR to self limit.
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