The RYOBI 40V 2Ah Lithium Battery features a compact and lightweight design that allows users to tackle all their projects. 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. Minimize fatigue when pairing this battery with portable or hand held products such as a chainsaw or hedge trimmer. 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 the secure quick-release button. Best of all, it is part of the RYOBI 40V system. This 40V 2Ah Lithium Battery is backed by the RYOBI 3-year manufacturer’s warranty and includes (1) OP4020A 40V 2Ah Lithium Battery and Operator's Manual. Charger sold separately.