The RYOBI Lithium HIGH PERFORMANCE Batteries are the perfect solution to add more runtime to your system. The 4Ah battery features up to 4X more runtime and the 2Ah batteries feature up to 2X more runtime than the previous models, 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 cells maximize performance and runtime during demanding applications. The robust design increases durability and enhances user experience. These batteries features a high visibility LED fuel gauge to clearly indicate remaining runtime. Easily install and remove the batteries with secure quick-release latches. Pair these Lithium HIGH PERFORMANCE battery with any 18V HP tool to leverage high performance brushless motors and advanced electronics for more power, longer runtime and the overall bes