Enter the RYOBI 18V ONE+ System with the 18V ONE+ 4Ah Lithium-ion HIGH PERFORMANCE Battery. This 4Ah battery features up to 4X more runtime than the previous model increasing overall efficiency. INTELLICELL battery technology features advanced electronics allowing batteries to last longer, think smarter and deliver up to 30% more power. The COOL-CORE design reduces temperature to optimize battery performance and extend battery life. Advanced lithium-ion cells maximize performance and runtime during demanding applications. The robust design and anti-vibration technology increases durability and enhances user experience. This battery features a high visibility LED fuel gauge to clearly indicate remaining runtime. Easily install and remove the battery with secure quick-release latches. Pair this Lithium-ion HIGH PERFORMANCE battery with any 18V ONE+ HP tool to leverage high performance brushless motors and advanced electronics for more power, longer runtime and the overall best experience on the 18V ONE+ system. This 18V ONE+ 4Ah Lithium-ion HIGH PERFORMANCE Battery is backed by the RYOBI 3-Year Manufacturer's Warranty and includes (1) PBP004 18V ONE+ 4Ah Lithium-ion HIGH PERFORMANCE Battery and Operator's Manual. Charger sold separately.