Bosch SKC181-202L 18-Volt Lithium-Ion Starter Kit with (2) 2.0 Ah Batteries, Charger and L-BOXX-2 L-BOXX system allows complete user customization, to fit the personal & individual needs of contractors, their company, trades and applications Convenient way to expand your storage options as your tool collection grows Bosch 18-Volt Batteries work longer - up to 65 percent more run time over previous generation Cool-Pack Technology - Innovative pack design dissipates heat for 2x recharge life Optimized cold weather performance, down to -4 degrees Fahrenheit