The HART 40V 4.0Ah Lithium-Ion Battery HLBP021A is a brand new, sealed power tool accessory designed for home and garden use. With a high capacity of 4 Ah and a voltage of 40 V, this battery is suitable for various power tools and workshop equipment. The sleek black design and model number HLBP02 make it a consistent and reliable choice for those in need of a lithium-ion battery for their tools.