The Greenworks 48-volt/24-volt 4Ah battery works with all 48V/24V tools. It's optimized to provide extreme power for the Greenworks Commercial 48-volt top handle chainsaw and 26" hedge trimmer. It features an on-board LED indicator for checking level of charge in real time, as well as tracking battery performance to maximize use. This smart battery also operates the full assortment of Greenworks 48/24 dual-volt outdoor power tools and power tools. (charger sold separately).