bfranchuk at jetnet.ab.ca wrote:
  Antonio Carlini wrote:
  Tony Duell wrote:
  Incidentally, I saw a 2.7kF (no, not a typo!)
low-voltage
      
 Don't these potentially "self-charge" to some degree?
 Just how much energy can one of these hold (what is its
 rated voltage?)
 Antonio
    
 I have no idea , but 2 volts feels right.
  
What?  That answer is nonsense.
Voltage and energy are two very different things, as you must know.
The correct answer can be found by using the equation E=mc^2.  How
massive is this 2.7kF capacitor?  :-)