-=> Quoting Troy H. Cheek to All <=-
 THC> Concerning operating scanners in a car...
--SNIP--
 THC> Anyway, aside from wiring my scanner so that it gets power from the
 THC> car battery regardless of whether the switch is on or not, what are my
 THC> options? I was thinking that maybe a good-sized capacitor might charge
 THC> in minutes yet provide days of 'parasitic' backup power for scanners
 THC> and CB's. 
 THC> Comments?
I use a 12volt "gell cell", with a diode in circuit, to 
power things like that (cell phone while cranking starter). 
The "gell cell" can power things all the time and be 
recharged by the car alternator, but the diode keeps the 
current from going back to the car system.
  + --FUSE------DIODE>--- + ---------- + ----- + 
                          |            |       | 
CAR                  "GELL CELL"     LOAD    LOAD
                          |            |       | 
  - --------------------- - ---------- - ----- - 
Each LOAD has it's own fuse. 
FUSE should be equal to or less then rating on "GELL CELL" 
I have had no problems with the "gell cell" over heating or 
over charging. At least to the touch it doesn't get warm 
at all. 
 
___ Blue Wave/386 v2.30
--- WILDMAIL!/WC v4.12 
---------------