When not plugged into 12v, the light only comes on when you press the big round "light" button. Stays on a few seconds, then turns off. As someone else noted, and I have observed, the temp reading varies slightly on 12v vs battery power. Edward At 07:39 PM 4/21/2005, you wrote: >Entity Jonathan Farrugia uttered this profundity: > > > all the stores in close distance to my house showed them but there was > > only the one on the shelf at the closest store, which i bought :). > > i don't know if > it stated in the web description but it runs on either > > two AAA batteries or 12 volts, to run the temperature functions that is. > > i had wondered about it being a parasitic drain on the system. > > Cease thy wonderment! I measure it at 27 mA per hour, which is .648 amp per >day. Hardly significant for daily driving. >I notice the backlight is on all the time when the unit is on 12v. Pretty >good idea. I wonder if I put batteries in it if it would only show the >backlight when it has external 12v? Anyone? > >-- Gnarlie |
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