[paulmd]

Dunno about the Leaf but at least with the Prius the battery is composed of individual cells that fit on a rail, so a lot of failures can be corrected by testing cell voltages and figuring out which one has failed and only replacing that one single one, which is usually substantially cheaper than a full rebuild.

[kube-system]

From what I've read, it's harder to fix the Li-ion packs, and in an electric car that relies entirely on the pack, degradation affects the driving experience more than a hybrid where you'd see it manifest itself as an MPG decrease.

The combination of information and parts available to fix Toyota NiMH packs is a big factor in why I own a vehicle with one :)

[srtjstjsj]

In practice you just trade in your old pack for a new one and let a professional deal with refurbishing or upcycling it into a wall battery.