Er, "violent explosion" may be  a bit of hyperbole.  After some long time (10-20 years?) old batteries can get extremely hot and spray noxious, corrosive chemicals all over the inside of your computer.  This is bad.  But they're not going to blow your computer to bits.  And the Tadiran batteries do seem at least somewhat less likely to do so than other brands (lookin' at you, Maxell!)

So it's a nice bonus, but nothing to write home about.  Good reminder to pull those old batteries out of your vintage equipment though.