18V 4.0 Ah Bluetooth® Lithium Ion Tabless Battery with Airstream

The TBX 4 Battery introduces Festool’s latest tabless cell technology, delivering higher power output, cooler operation, and longer service life—without added weight. By eliminating traditional cell tabs, energy flows more efficiently through the battery, reducing heat buildup while improving power delivery, runtime, and charging speed. The result is stronger, more consistent performance for demanding applications, with less stress on the battery over time. The optimized energy flow of tabless technology not only boosts tool performance but also helps extend overall battery lifespan.

When used with the Festool app, users can access detailed battery data including charge level, temperature, and charge cycles. Compact, powerful, and intelligent, the TBX 4 battery delivers advanced performance in a familiar form factor—and is fully backed by Festool’s 3-year warranty for complete peace of mind.

• When charged on an AIRSTREAM rapid charger, battery parks are charged quickly and effectively with active cooling during the charging procedure.
• Integrated LED display on the battery pack provides you with the charge status at all times.
• Bluetooth enables the CT Dust Extractor to be started automatically when the cordless tool is switched on (Bluetooth capability on the CT Dust Extractor is required)
• Compatible with Festool 18 V cordless tools (except ETSC 125, RTSC 400, DTSC 400)
• Weight: 1.32 lbs (.6 kg)