Boostcap ultracapacitor cells operate at 2.7V

The K2 series Boostcap cells operate at 2.7V and incorporate design and construction enhancements to ensure high performance, durability and long operating lifetime.

Primary applications for Maxwell's K2 series products, which range from 650 to 3,000 farads, include automotive subsystems, hybrid- and electric-vehicle drive trains, renewable-energy systems, back-up power, grid stabilisation, electric-rail system power, and other transportation and industrial applications that require burst power and heavy cycling that cannot be efficiently provided by a battery or power supply alone.

The company is currently shipping K2 cells in production volumes and multi-cell modules ranging from 16 to 125V.

The K2 cell design features a rugged welded electrical pathway with increased contact and higher surface area, and replaces Maxwell's previous MC series cell.

Features of the K2 cells include: ultra-low internal resistance; highest power performance available; lowest resistor-capacitor (RC) time-constant 2.7V operating voltage; over one million charge/discharge cycle lifetime; superior performance at extreme temperatures; and proprietary material-science and packaging technology.

Maxwell manufactures and markets additional Boostcap ultracapacitor products ranging from 10 to 350 farads and multi-cell modules based on those products for wind turbines, smart utility meters and a variety of other industrial, telecommunications and information-technology applications.