They're all massively better than the zinc-air ones that barakta litters around the place.
As a hearing aid user I'm interested in why zinc air is used.
They're cheap and have a surprisingly high energy density, if you don't include the oxygen they absorb from the air.
The main disadvantage is the high self-discharge rate, but that doesn't matter for a hearing aid where the battery is used at a very high duty cycle. You wouldn't (except in emergencies when there's a hearing aid user around) want to run your bike computer, digital caliper or Lightweight Racing Multimeterâ„¢ on them.
Lithium can be fatal as the battery fizzes away and acids eat through your gut.
It's more subtle than that, the lithium cell voltage (assuming there's some charge in it) is high enough to electrolyse stomach contents to produce sodium hydroxide at the terminals, which eats through your gut. Lower voltage cells can't do that. The danger is that it happens much more quickly than a cell corroding and leaking its contents.
Barakta will be along at some point to share her childhood tales of having batteries confiscated by Stupid Teacher in case she might eat them, and (when slightly older) stabbing the depleted cells with compasses to get the metallic mercury to play with.