[js2]

That is terrifying. How do you plan to handle/dispose of that battery? I guess I'd unplug the Mac from AC and run the battery all the way down, but then you probably should have a fireproof bag to transport it to someplace that will accept it for disposal/recycling.

edit: ifixit instructions:

https://www.ifixit.com/Wiki/What_to_do_with_a_swollen_batter...

[chx]

I had someone to come and replace the battery and take the old one away. Not my problem any more.