Wondering how old the battery is in my truck. The place that used to own it (my current employer) stated that they had taken it from another vehicle. The code stamped on the side is 1L03BSJD. If I am interpreting it correctly, the date is Nov or Dec of 201, making it almost 16 yrs old. I've run this battery completely down at least three times by leaving the headlights on. It seems to start every time without a hitch.