SANCC&trade; 18-Volt Lithium-Ion 4.0Ah Battery for Bosch BAT609 BAT609G BAT618 BAT618G BAT619 BAT619G Battery Type: Lithium Ion, Voltage: 18V, Capacity: 4000mAh High quality replacement battery for Bosch BAT618 BAT618G BAT609 BAT609G BAT619 BAT619G Batteries are made with the high quality SAMSUNG CELLS, Integrated microchip prevents overcharging & lengthens battery life 100% Compatible with original manufacturer equipments and chargers 30 Days Money Back and 1 Year Warranty