The Kawai & Teisco Analog Synths Group

I bought three as I was not sure of the symbol. Which one of these 
should I use? (if any...) Check out the pic:
http://img218.imageshack.us/img218/5844/clipboardof5.jpg
Can I use more than 1 diode in case one breaks down, for greater safety?
cheers
aero


--- In kawai_analog@yahoogroups.com, "gil_we" <gil_we@...> wrote:
>
> You can simply take off the original battery, then attach a coin cell
> type lithium in a coin type battery holder (like the ones
> motherboards have) using double sided adhesive tape, connect the
> cathode (negative side) of the holder just to where the original
> battery cathode goes, and the anode (positive side) to a diode
> (positive side of the 1N4148 diode facing the positive side of the
> battery). Negavite side of the diode goes to the 1.5K resistor,
> originally connected to the battery.