I've been testing "disposable" vape lithium cells (Patreon)

So far all the salvaged lithium cells I've tested have taken a charge to their full capacity, suggesting they are fresh and quite good quality.  Not surprising given the huge volume of units sold and the high current they operate at.

This makes them very useful for retrofitting into things with tired cells.  But remember that the disposables have no separate protection for the cells.  (Over/under voltage and overcurrent), but the original protection PCBs from the original product's cell could be reused if needed.

I see that some of the prominent brands are already planning for damage limitation when the scandal hits of them putting a massive number of reusable lithium cells into landfill.  Once people are hooked on the brand they are offering a similar looking option with a recharge port and refill pods.