Energy Set SYS 18V 2×4,0/TCL 6 DUO
The Festool Energy set is the ideal addition to the Festool Basic (no batteries included) cordless tools and also offers additional battery packs for the workshop and the job site.

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The Festool Energy set is the ideal addition to the Festool Basic (no batteries included) cordless tools and also offers additional battery packs for the workshop and the job site.
Start with the surface, the existing finish and the way the space or equipment is used. Our team can help you work through product choices and the requirements for your project.
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The project.
Identify the material, its condition and the work you’re planning.
The system.
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The conditions.
Check the current manufacturer instructions for application, installation or maintenance requirements.
THE DETAILS.
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| Product number | 577108 |
|---|---|
| Capacity | 4.00 Ah |
| Voltage | 18 V |
| Charging current | 2 x 6.0 A |
| Input voltage | 120 V |
| Weight | 11.90 lbs (5.4 kg) |
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Technical information.
Safety information.
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Energy Set SYS 18V 2×4,0/TCL 6 DUO
Technical data sheet – Security Information Battery Pack
Read the full product requirements, application instructions and limitations.
Transport Document Battery Pack
Read the manufacturer’s instructions and product information.
Transport Document Battery HPC
Read the manufacturer’s instructions and product information.
Check the product label and current manufacturer documents for the exact component, colour and region before use.
Full product details, applications & manufacturer specifications
The Festool Energy set is the ideal addition to the Festool Basic (no batteries included) cordless tools and also offers additional battery packs for the workshop and the job site.
Available with different battery configuration to meet the needs of the application. Additional slots provide sufficient space for a total of four battery packs – of which two can be charged at the same time using the TCL 6 DUO Rapid Charger. Particularly practical: You no longer need to look for another outlet for a second charger – making work easy and saving time on the job site or in the workshop.
Securely packed in heavy duty foam inside the Systainer³ which provides storage, organization, protection and easy transport and fully covered by Festool Service.
Recommended uses
Tools & equipment.
- Product number
- 577108
- Capacity
- 4.00 Ah
- Voltage
- 18 V
- Charging current
- 2 x 6.0 A
- Input voltage
- 120 V
- Weight
- 11.90 lbs (5.4 kg)
Complete your project.
Companion products for the selected product and system.

Cordless rotary hammer drill KHC 18 EB-Basic
Power the compatible KHC 18 Basic tool with the Festool 18 V battery system.
This energy system fits Festool 18 V tools listed by the manufacturer; it does not fit ETSC 125, RTSC 400, DTSC 400 or CTC SYS.
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Share the surface, its condition and what it needs to stand up to. We’ll help you work through the product choices and preparation.
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