How old is the battery? The cold weather will knock it out if it's old. Will the head lights work or are they dim?
The Auto electrician can do a current drain test. To see if any electrical component is draining the battery.
To check for a drain shut all the doors and wait for the interior lights to go out and see what the amps reading is this will tell you if anything is draining the battery.To narrow down which circuit is draining you will need to start removing fuses one by one to see if the reading changes.
It should be done with Digital Volt Meter set on the amps scale and connected in series on the battery negative. You should not have more than 0.03 Amps parasitic drain.
http://www.mwautos.webs.com/
Martin @ MWAutos
February 2009