The Festool 5.0Ah 18V AirStream Battery Pack with Bluetooth is the all-rounder, all-singing, all-performing heart of Festool cordless range. The powerful all-rounder performs impressively with excellent output and long running times per battery charge because of the perfect combination of the battery pack with brushless EC-TEC motors. Thanks to AIRSTREAM technology, the battery pack is actively cooled with the AIRSTREAM rapid charger before and during the charging procedure, meaning that it is ready for use again extremely quickly with maximum charging power. With built-in Bluetooth connectivity, you can automatically start a paired mobile dust extractor as soon as you activate your power tool, thereby ensuring you have a clean working environment, free from .