Lithium batteries are different from
lithium-ion batteries. As far as I know lithium batteries are not rechargeable. Lithium batteries use lithium in its pure metallic form and are much more unstable than Li-Ion batteries, which use lithium compounds instead of pure metallic lithium.
Does this warning mean Li-batteries, Li-Ion batteries or anything that resembles any kind of lithium, like the dilithium from Star Trek?
I know that Lithium (pure metallic) have been in no-checked-baggage list for years, maybe a decade even, but Li-Ion not.