The Snap-On Tools CTC131 14.4V & 18V Lithium Dual Bay Black Battery Charger is a high-quality charging unit designed for automotive tools and power tools. This charger, with a voltage of 18V, is manufactured by Snap-on, a trusted brand known for producing reliable automotive equipment. It is a single unit with a lithium battery power source, perfect for charging both 14.4V and 18V batteries. Made in China, this charger is a versatile and efficient tool for maintaining and charging your power tool batteries.