Festool - 578946 - Energy Set SYS 18V 4xTBX4/TCL6DUO

Product Highlights

Power your entire 18V system.
Full power, low weight.
Backed by Festool Service.
Whether you’re expanding a Festool Basic tool or adding capacity to an existing setup, the Energy Set delivers a complete, ready-to-work power solution. The set includes four TBX 4.0 Ah Tabless Batteries and the TCL 6 DUO rapid charger, all neatly organized in a Systainer³—providing ample power for both the shop and the jobsite.
The TBX 4 Compact batteries deliver impressive power in a lightweight, well-balanced design. Advanced tabless cell technology improves energy flow, reduces heat buildup, and enables longer runtimes and faster charging. With the DUO charger, two batteries can be charged simultaneously—keeping tools running with minimal downtime.
Like all Festool batteries and chargers, the components in this Energy Set are fully covered by Festool Service. That means dependable support, long-term reliability, and peace of mind—so you can stay focused on the work, not the power supply.

Features and Benefits

Lightweight power for reduced fatigue: TBX 4 battery packs deliver full output in a compact, lightweight design—helping reduce fatigue during extended work without sacrificing performance.
Maximum power for demanding applications: Advanced tabless cell technology improves energy flow and reduces internal resistance, delivering strong, consistent power even under heavy load.
Extended battery service life: Lower heat generation places less stress on the cells, helping extend battery lifespan and maintain performance over time.
Automatic dust extraction start: Bluetooth®-enabled batteries automatically start a paired Festool CLEANTEC dust extractor when the cordless tool is stwitched on.
Smart battery management: When used with the Festool app, Bluetooth® functionality provides access to detailed battery data including charge level, temperature, and charge cycles.
Charge two batteries at once: The TCL 6 DUO rapid charger charges two battery packs simultaneously, maximizing productivity and minimizing downtime. Compatible with Festool battery packs from 10.8 V to 18 V (except BP-XS for CXS/TXS and MXC chargers). Covered by Festool Service: All batteries and the DUO rapid charger are fully covered by Festool Service for long-term reliability and peace of mind.

Product Details

More power with less fatigue: The TBX 4 Compact Battery delivers full power in a lightweight, well-balanced design. At just 1.3 lbs (600 g), it reduces user fatigue during extended work while maintaining strong, consistent performance for demanding cordless applications.

Built for system integration: The Systainer³ is designed to integrate seamlessly with Festool storage and vehicle racking systems, allowing batteries and chargers to be transported securely and efficiently from the shop to the jobsite as part of a complete system.

Smart features built in: Bluetooth® connectivity automatically starts a paired Festool CLEANTEC dust extractor when the cordless tool is switched on. When used with the Festool app, users can access detailed battery data such as charge level, temperature, and charge cycles at any time.

Specifications

Weight 11.90 lbs (5.40 kg)
Capacity 4.0 Ah
Voltage 18.00 V
Charging current 2 x 6,0 A
Input voltage 120.00 V

Included in Delivery

4 x Tabless Battery BP 18 TBX 4 C-ASI, TCL 6 DUO Rapid Charger, Systainer SYS3 M 187

Product Information

Manufacturer	Festool
SKU	578946
EAN / UPC	4014549474310
Quantity in Pack	1
Product Type	Accessory
Country of Origin	CN
Product Group	Battery and charging technology/Energy set/Energy set
Customs Tariff Number	850760

Packaging

Length: 15.67 in
Width: 11.65 in
Height: 7.36 in
Packaged weight: 14.11 lb
Package volume (calculated from dimensions): 1343.61 cubic inches

Additional Manufacturer Details

Catalog description: Energy set SYS18V 4xTBX4/TCL6DUO US

Compatible Accessories (SKU References)

578745
577018
204842
577155