Yep, SC is santa clara, I sat in SC12. That's, like, the north south bay. I guess. Not South Carolina...
It wasn't the voltage that did him in, it was the current. Oops.
Interestingly, using a lower voltage than spec may well hurt things, depending on factors. It might cause the battery to deplete itself, since basically the dead battery is now trying to charge the fully alive one - and with nice fat terminals and jumper cables, it might do so at a speed similar to shorting things. It might also cause all sorts of crazy undervoltage conditions, where elements protect against overvoltage, but various pathways won't turn on at a lower voltage but current will still flow. It's weird, but it can definitely happen.