[Cthulhu_]

> Reuse is better than recycling.

True and I agree, however batteries have a limited lifetime, and at the end of said lifetime, lithium batteries become dangerous. Does anyone risk putting a secondhand battery in their phones for example? Might be okay for old Nokia style batteries, but the integrated ones, not a chance.

Another problem is that with EV battery packs, they're not really viable to be disassembled and repaired (e.g. by replacing individual cells), they're built pretty solid and integrated. Not saying it's impossible, just that it's likely not viable, not to mention very dangerous work. I could be wrong though.

[bryanlarsen]

> they're not really viable to be disassembled and repaired

The fact that you can sell a dead EV battery pack for good money indicates that it is viable.

[thomaslord]

There are lots of 18650 "manufacturers" that actually just buy used batteries, re-wrap them, and sell them as new. I imagine that used Tesla battery packs may be used for this purpose pretty frequently. Unfortunately while this activity provides a great value for the players involved, the batteries are often passed off as new high-discharge cells to consumers who use them for vaporizers or flashlights. Using old spent cells for both of these use cases can be dangerous, but it's particularly worrying in vaporizers because the battery may fail catastrophically inches from the consumer's face.

[HeadsUpHigh]

No one is putting cylindrical cells on phones. These go to stationary storage. Also some people test and save each cell separately and put them in new packs.

[AtlasBarfed]

The Tesla LFP batteries aren't just million mile batteries, Jeff Dahn said there was no detectable degradation from cycling.

For those that don't know, LFP is only going to be in the short range M3 until more improvements in density (or better integration) hit mainstream.

[PaulDavisThe1st]

> Another problem is that with EV battery packs,

Clearly addressed in TFA.