Duracell employs 400 people in LaGrange and 275 in Fairburn, and it will add 110 more jobs in the new office at Science Square, an 18-acre development west of Tech’s Midtown campus featuring 1.8 million square feet of lab and office space. The American company follows a well-worn path of corporations setting up innovation centers near Georgia Tech, though this constitutes the most recent landmark win for Science Square, a mixed-use facility that will also include 500 residential units and 25,000 square feet of retail space. Portal Innovations, a Chicago-based venture capital fund that helps biotech companies start and scale, was the first tenant in the Science Square Labs building, taking 33,000 square feet of lab space.