I have a RAVPOWER powerbank that I have just noticed has started to swell, enough to crack the plastic enclosure. It doesn't appear to be heating up, but I'm not sure how quickly that happens. It contains prismatic cells, which is what most of the videos you see online seem to have.
I need to dispose of it safely. I can't put it in my household rubbish or street bin in case it suddenly catches fire. I probably shouldn't put it in one of those battery bins that some stores have, for the same reason. I guess taking it to the local tip could cause the same issues.
I thought about burying it a couple of feet deep in the ground away from anything flammable, but that's probably not very environmentally sound.
What do people think I should do with it?