[mrguyorama]

On the contrary, I bet these cells are perfectly good cells (initially, after sitting on the side of the road they should definitely be considered dangerous). Remember that "a completely functional lithium battery pack, sometimes with charging and protection circuitry" is sold pre-charged as a "top up" pack for mobile phones and meant to be thrown away after.

Lithium batteries are absurdly cheap, and it's not too expensive to buy essentially off the shelf, rated capacity and lifetime cells in order to be reasonably sure 99% of your products last for 99% of their rated puffs.

If your disposable vape doesn't produce as much as competitors because you cheaped out on your lithium cell procurement, your competitor will happily scoop up that business as word of mouth spreads.