This Festool 18V 5.0Ah Lithium Battery BP18 5Ah AirStream Bluetooth is designed for high performance and reliability. It offers a 5.0Ah capacity, ensuring extended run time for your power tools. The AirStream technology enhances cooling for longer battery life, and Bluetooth connectivity allows for smart battery management and diagnostics. This battery is compatible with the Festool 18V system and is ideal for professional use where power and endurance are crucial. Part number: 577660.