Ideal addition: The 5.0 Ah battery packs are powerful all-rounders for all applications and are compatible with almost all Festool battery products. They are particularly suitable for all tasks and 18 V devices with a focus on performance and endurance. For example, they are perfect for prolonged work with Festool cordless vacuum cleaners CTC MINI/MIDI, KSC 60, AGC 18, HKC 55, TSC 55, as well as for particularly heavy drilling and screwing applications with TPC 18 / TDC 18. Automatic dust extraction: The Bluetooth battery packs automatically start a paired dust extractor when the tool is switched on. Smart expansion: The Festool WorkApp, in combination with the Bluetooth function of the battery pack, offers clever additional features, such as detailed display of the charge level and other operating data like temperature or charge cycles. To quickly and easily identify the battery with the lowest charge, the LED display on the battery pack can be made to blink. Software updates are also possible: Install the latest version to always work with the functions of the tools. Charge two simultaneously: The DUO fast charger charges two battery packs at the same time. It is suitable for all battery packs in the 10.8 V, 14.4 V, and 18 V classes (exception: BP-XS for CXS/TXS 10.8V). Neatly organized: Packaged in a Systainer with enough space for a total of four battery packs and the DUO fast charger. Mobile: Packaged in a Systainer, the energy Systainer can be perfectly integrated into the bott vehicle system for easy transport from the workshop to the construction site. Better in the system: Systainers are compatible with each other and can be coupled with all previous Systainer generations, dust extractors, and many other system accessories. Fully secured: Of course, the DUO fast charger and all battery packs are fully covered by the Festool service. The Festool Energy Set is the ideal addition.