this post was submitted on 29 Apr 2026
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China's new iron battery hits 99.4 percent efficiency over 6000 cycles (interestingengineering.com)
submitted 4 hours ago by Gsus4@mander.xyz to c/technology@lemmy.world
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[–] vinnymac@lemmy.world 12 points 2 hours ago (3 children)

Just make hot swapping batteries normal again like it used to be.

[–] SpaceNoodle@lemmy.world 5 points 1 hour ago* (last edited 1 hour ago) (1 children)

When was hot-swapping batteries normal? What was the backup power source? I'd only ever seen normally swappable batteries where the phone would need to power off and back on.

[–] vinnymac@lemmy.world 2 points 13 minutes ago (1 children)

I’ve never owned a flip phone that I couldn’t plug in and swap the battery with a new one without it turning off. If that wasn’t normal with your phones I’m not sure why, maybe different circuitry?

Regardless making devices easy to repair, and thus open and maintainable was what I was getting at.

[–] SpaceNoodle@lemmy.world 2 points 9 minutes ago

Somehow, I forgot about charging cables.

[–] Flagstaff@programming.dev 4 points 2 hours ago (1 children)

There actually was a Chinese EV startup that had battery swap stations: drive up onto the system, and the battery is directly under your car; the swap takes <1 minute. I don't remember what it was called, though, nor if it ever made it.

[–] otacon239@lemmy.world 5 points 2 hours ago (1 children)

Tom Scott did a video on it. In all honesty, there are a number of things about this system that I just don’t see working well in the long term, but it’s an interesting prototype nonetheless.

https://youtu.be/hNZy603as5w

[–] Flagstaff@programming.dev 1 points 2 hours ago

That's it: Nio! Yeah, I dislike the reliability on the company, too.

[–] Gsus4@mander.xyz 2 points 2 hours ago

There was one like that in Taiwan for scooters.