Thanks for the heads up. When I checked it this morning after the battery tender had been on for over 12 hours the green light was flashing which indicates the battery had at least an 85% charge. So I guess it was really low. Going to give it one more try and go from there.
As for going w/ a Sears battery, if I did my local BMW dealer wasn't going to register the battery so was feeling a tad trapped. I will next time reconsider if there is a next time when it comes to replacing my battery.