Johnson Controls, Inc. is a global diversified technology and industrial business company. It operates through three business segments: Building Efficiency, Automotive Experience and Power Solutions. The Building Efficiency segment engages in designing, producing, marketing and installing integrated heating, ventilating and air conditioning systems, building management systems, controls, security and mechanical equipment. It also provides technical services, energy management consulting and operations of entire real estate portfolios for the non-residential buildings market. This segment also provides residential air conditioning and heating systems and industrial refrigeration products. The Automotive Experience segment provides innovative interior systems through its design and engineering expertise. The Power Solutions segment is a global supplier of lead-acid automotive batteries for passenger car, light truck and utility vehicle. It serves both automotive original equipment manufacturers and the general vehicle battery aftermarket. It also supplies batteries to power Start-Stop vehicles as well as lithium-ion battery technologies to power certain hybrid and electric vehicles. The company was founded by Warren Johnson in 1885 and is headquartered in Milwaukee, WI.