1 x Einhell Power X-Change Plus Slimline Battery 18V 4.0Ah Li-ion. Einhell Power X-Change Plus Slimline Batteries feature the latest generation of lithium-ion cells provides 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 the self-discharge which usually occurs in batteries for constant, high power. The process-driven ABS active battery management system continuously monitors the 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 L.