The compact lithium-ion battery gives up to 20% more run time, weighs 45% less and holds a charge 4 times longer than a Ni-Cd battery. Lithium-ion batteries provide fade-free power, which stays constant until the charge is depleted and does not fade away like the power of a Ni-Cd battery. The compact design is ideal for use in tight areas and overhead applications. The charger features patented IntelliPort Technology, which protects battery cells, maximizes battery life and is ENERGY STAR rated. Product shipped in bulk packaging.