Yes, There is a Killer USB that Can Explode Your Computer

Dark Purple, a Russian researcher, developed a USB pendrive that can fry a computer or laptop from the inside. An inverted DC/DC converter runs and charges capacitors to -110V which then runs until everything is broken down. Overriding temperature controls and creating access heat damages the computer nearly beyond repair. For more on this troubling USB, click here:: This ‘Killer USB’ can make your Computer explode