RYOBI 40V Lithium-Ion 4.0 Ah Battery OP40401A1 (Gen 1)

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 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.