The Einhell PXC 2 x 4.0Ah Starter Kit Twincharger Kit is for universal use featuring 2 x 4.0ah PXC PLUS batteries and the PXC Twincharger. Max. safety is ensured by the proactive battery + intelligent charging management system. All the parameters are permanently monitored by state-of-the-art components. The high-quality li-ion cells are resistant to self-discharging. Impact protection and a good grip are provided by the rubber-coated housing + recessed handles. Einhell Power X Change 18v Lithium Ion 4.0ah PLUS Battery Einhell Power X-Change Plus Slimline Batteries feature the latest generation of lithium-ion cells providing 100% more power for maximum performance in all applications, with a 13% more compact design and 12% weight reduction. PLUS technology also means extra power for intensive work. In addition, the high-quality battery resists the memory effect and self-discharge which usually occurs in batteries for constant, high power. The process-driven ABS active battery management system continuously monitors battery settings using the integrated microprocessor. This ensures maximum safety, optimal device performance, maximum runtime, and maximum service life. You can check the current charge status via the 3-stage LED indicator. The housing is resistant to dust, corrosion, and mechanical influences thanks to its construction. The rubber coating gives the battery high impact protection and a good grip. Thanks to the recessed grip, it can be easily removed from all units. A member of the multifunctional and completely interchangeable Power X-Change rechargeable battery system from Einhell. The Power X-Change rechargeable batteries can be used universally for supplying power and endurance to every cordless tool from the entire garden and workshop product family. Features Universal usability for all Power X-Change rechargeable devices: Saving money, protecting the environment, and flexibility. Latest cells deliver 100% more power.