Prompted by this thread and the OPs soldering skills, no disrespect intended, I have done a bit of reading up on my material. I have a report on lab tests undertaken by Samsung on their high discharge cells which included, believe it or not, putting them in an oven at 140C.
After 20 minutes their capacity nosedived.
Well, with memories of Steven Seagal's microwave booby trap in Under Siege I am surprised that they didn't bloody explode.
I would say if anything this is a comforting thought.