The Ryobi ONE+ 18V 4.0Ah Lithium+ Battery and Charger kit is designed to provide extended runtime and superior performance for all Ryobi ONE+ tools. The 4.0Ah Lithium+ battery delivers maximum power for demanding tasks, making it perfect for high-energy applications like drilling, cutting, and more. The included charger features IntelliPort technology for fast and safe charging, helping to optimize battery life. This kit is a must-have for those looking to expand their ONE+ toolset with increased power and efficiency.