The Genuine Kobalt 40v MAX 4.0 Ah Extended Run Li-Ion Battery with Charger is a high-quality power tool accessory designed for extended run time. With a powerful 40V voltage and a 6.0 Ah lithium-ion battery capacity, this battery offers reliable performance for a variety of tools and equipment. The sleek black color and MAX model ensure a stylish and efficient power source for your projects in the home and garden. Trust in the Kobalt brand for top-notch battery technology and compatibility with your power tools.