The Bosch 18v 6ah Li-Ion Cool Pack Battery is a part of Bosch's 18v range and is fully compatible with existing power tools and chargers that charge the 5.0,4.0, 3.0ah Cool Pack batteries and chargers. Compared to the 5Ah equivalent this battery offers an impressive 20% more run time, with CoolPack technology that ensures 100% longer life. It remains fully functional even after being dropped from 3m onto concrete. It also features a charge level indicator to ensure maximum efficiency and visibility.