Festool 578745, BP 18 TBX 4 C-ASI 18V Battery

Bluetooth lithium-ion (Li-Ion) battery pack with tabless cell technology and AIRSTREAM function.

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. Paired with Festool’s AIRSTREAM charging system, the TBX 4 battery is actively cooled before and during charging when used with the AIRSTREAM SCA 16 quick charger. This active cooling allows the battery to recharge faster and return to work sooner—ideal for professionals who rely on continuous productivity. The optimized energy flow of tabless technology not only boosts tool performance but also helps extend overall battery lifespan. Integrated Bluetooth connectivity adds smart functionality, automatically starting a paired Festool dust extractor when the cordless tool is switched on. 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.

Increased power output: TBX batteries with tabless cell technology deliver higher power transfer with less heat buildup—resulting in stronger performance, longer runtime, and extended battery service life for demanding cordless applications.

High Output with Low Weight: The TBX 4 Compact battery delivers impressive power in a lightweight, well-balanced design. At just 1.3 lbs (600 g), it provides high output without added bulk, making it ideal for medium- to high-demand applications where control and handling matter.

Smart connectivity with Bluetooth and the Festool app: Integrated Bluetooth technology automatically starts a paired Festool dust extractor when the cordless tool is switched on. With the Festool app, users can monitor detailed battery information including charge level, temperature, and charge cycles—keeping performance transparent and predictable.