CAP-XX Limited, together with its subsidiaries, develops, manufactures, and sells supercapacitors primarily in Australia, the Americas, the Asia Pacific, Europe, the Middle East, and Africa. The company provides supercapacitors for the use in wireless applications, such as wireless sensor networks, ruggedized PDAs, mobile phones, and PCMCIA and compact flash products; and consumer product applications, including eBooks, toys, converged handhelds, digital music players, notebook PCs, and digital still cameras. It also offers supercapacitors for automotive, location tracking device, medical device, metering, and industrial handheld terminal applications. The company, formerly known as Energy Storage Systems Pty Limited, was founded in 1997 and is headquartered in Lane Cove, Australia.