I would have just trusted Anker in this case. Amazon only knows you bought that model of battery, not whether it was affected. Anker would (or should) know exactly what range of serials were made with the problematic cells.

Brought them to a special pickup/disposal point? Cause otherwise they will light on fire somewhere else.

No idea where GP lives, but in lots of places there's simply no other option. Your best bet is to discharge the battery as far as you can make it, and then dump it with the rest of the trash. I don't have anyone willing to accept any batteries for recycling withing a few thousand kilometers. And yes, Amazon ships here just fine.

You can't put the lithium itself out with water, but presumably water would still keep everything around it from burning?

It's not the lithium that's burning - it's first the electrolyte, typically ethylene carbonate, which decomposes the cathode - a process that releases oxygen, which in turn fuels the fire.

There's actually very little lithium by weight in li-ion batteries.

> Your only option is to run.

That is not true. Please don't spread misinformation that could lead to deaths or people losing everything they own.

You can put out a Lithium battery fire with a class-D fire extinguisher. If you don't have one available, you can isolate the burning battery by surrounding it with sand or other inert, dry substances to keep it from spreading until the fire department arrives with proper equipment to dispose of or extinguish it.

Are you trying to imply that "sand or other inert, dry substances" are too exotic to be in an average house?

Also you can keep things near the battery wet.

So what, you keep a bucket of sand in your bedroom?

I didn't say it was in the same room. I just disagree with "your only option is to run".

You’re not making convincing arguments, frankly.

Enough water will suppress the fire and deprive it of heat for thermal runaway and keep nearby items from catching fire.

If you stop the water, it may reignite or smolder and produce smoke, but water will work to combat the fire.

Will it emit hydrogen gas?

Water won't put it out but putting it in a big enough container of water and leaving it there long enough works. You just need a big enough energy sink + containment.