When I switched battery sets today, I see the HCigar VT133 logo for a split second when pressing the Fire button, then nothing. Mod not working. Holding the Fire button displays "Check Battery." Batteries each measure 4.2v each in my charger, but Device Manager reports: Cell1: 0 volts Cell2: 5.22volts !! (HG2 batteries) I've cleaned the contacts, and tried the battery set that I just removed, with the same result (previous battery set was working fine earlier today). Any suggestions as to what I can do to get the mod working again? Thanks!