Nope, nope and nope.
I have used your technique with great success in the past Mike, first seen on your channel
but these packs are glued not welded, I’ve whacked the crap out of it with my screwdriver handle an it ain’t moving.
(BTW - my modded Flir E4 is still going strong, apart from a hot pixel, thanks for your work there!!)
The vice compression method crushes the pack too without any signs of seam popping.
Gentle, careful use of the Dremel has been the way so far, then plastic spludger and brute force to tear the pack open. Nervous stuff close to a large open area of concrete, if it all goes pear shaped.