I nearly had a fit when I first saw this thread as I've been using my N95's charger to charge both my 770 and BH-600, imagine my relief when I just checked the charger and found that it was not DC-4 as I first thought but a DC-5X rated at 5V, phew!

Although if indeed the 770's regulator is rated up to 12V as wassabi states I'd of had nothing to worry about, it did give me a bit of a scare mind