The Incredible Expanding Macbook Battery(s), Part 3

Just when you thought it was safe to go back into the laptop -- here's Part 3. (Part one and part two are here.) This is my replacement Macbook battery, which, like its predecessor, expanded like popcorn, and was left sitting about to do its thing.

Yeah, I'm aware that it's probably stupid to leave a damaged lithium ion battery laying about your house. I don't care, though, largely because I left it laying about as a result of being phenomenally careless and forgetful. It's my experiment, you can just observe the (harmless, evidently) results.

I didn't buy a third one. I bought an iMac instead.