The car started ok this am . Outside temp minus 11C. The battery was most likely just below the threshold where not enough juice was available to start. The short trickle charge I had applied was enough to get it going. Back and forth to work today was about 60kms in total and about 50 minutes of driving time. Voltage meter showed a little over 14 at idle and 12+ with the engine off.
I won't be surprised if it runs down again.
Take care everyone and have a Merry Christmas and/or a Happy Holiday season