Watch this hydraulic press flatten batteries like a pancake. The video will either soothe you or creep you out.
It may look exciting, but the batteries may spark and catch fire. Make sure you don’t do this at home, even if you happen to have a hydraulic press.
Via Experiment at Home.
With the Li-Ion cells, they do what we call a propagation test. This is a way to make the batteries fail and ignite. If they press without the nut, the results mat be different