Bosch SKC181-202L. . Features: L-BOXX system allows complete user customization, to fit the personal and individual needs of contractors, their company, trades and applications. Convenient way to expand your storage options as your tool collection grows as this system locks together for easy transport, handling, and added protection against damage. 18V Lithium-Ion batteries work up to 65 percent more run time over previous generation. Unique Cool-Pack design offers advanced heat conductive housing to keep battery cooler to live up to two times longer. Lithium-Ion battery will work down to -4 degrees Fahrenheit for the most extreme conditions.