The Ryobi ONE+ 18V 4.0 Ah Lithium-Ion Battery PBP2005 (2-Pack) is a high-quality power tool accessory designed for use in various tools and workshop equipment. With a 4 Ah battery capacity and 18 V voltage, these black batteries provide reliable power for extended periods of time. Made by the trusted brand Ryobi, these lithium-ion batteries come in a convenient 2-pack, ensuring that you have an ample supply for all your projects. Perfect for home and garden use, these batteries are a must-have for any DIY enthusiast or professional craftsman.