The RYOBI 40V 4Ah Lithium Battery features up to 2X more runtime than the previous model for an improved user experience. 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. Las celdas de litio mejoradas maximizan el rendimiento y el tiempo de ejecución durante los trabajos exigentes. El diseño robusto y la tecnología antivibración aumentan la durabilidad y mejoran la experiencia del usuario. Esta batería cuenta con un indicador de combustible LED de alta visibilidad para indicar claramente el tiempo de funcionamiento restante. 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 4Ah Lithium Battery is backed by the RYOBI 3-year manufacturer’s warranty and includes (1) OP4040A 40V 4Ah Lithium Battery and Operator's Manual. Charger sold separately.