Uploaded August 2021 | Updated September 2026, 3 weeks ago

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In the last video, a T-class fuse saved my arse when I dead-shorted my 48v Lifepo4 battery. In this short video, we take a look inside the fuse. There's not much to it, but it a way, it's pretty amazing it can do such an important job so reliably.

The fuse was a Littlefuse JLLN-200A - littelfuse.com/products/fuses/industrial-power-fuses/class-t-fuses/jlln/jlln200.aspx

Previous video with the accident - youtube.com/watch?v=HhiEky64BLg