Sorry for the delayed response. I had to leave on business and finally got back to updating y'all.

I did the overnight trickle charge then took her over to a mechanic's shop nearby. The car was still displaying the Check Engine "Electrical Function" which had me nervous. I thought I might have fried something.

Tioga (German car mechanic extraordinaire) jacked into the dash and read the fault codes. While I can't remember the exact description it was a glow plug issue that he is pretty certain was related to the low power starts. He reset the codes and none have re-appeared since.

So, after all that it WAS the battery.

Thanks to everyone for their input and help. Hope to return the favor someday.