The 2x 18V 4.0 Ah Power X-Change batteries are part of Einhell's multifunctional and infinitely combinable Power X-Change battery system. The universally applicable Power X-Change batteries provide power and endurance to all battery-operated devices across the entire product family in the garden and workshop sectors. The benefits for customers are clear: with one battery and one charger for all devices, not only are significant costs saved on purchases, but the universal applicability is environmentally friendly and offers flexibility in the home and garden. There is also no clutter or chaos with various batteries and chargers for each individual device. The 18V 4.0 Ah Power X-Change is a basic battery of the Power X-Change family and is also suitable for TWIN-PACK use in 36V applications. With two 4.0Ah batteries in a TWIN-PACK, you can work longer, and the devices can be powered with more energy (2x 18V = 36V). The process-controlled active battery management system (ABS) continuously monitors the battery parameters using the integrated microprocessor. This ensures maximum safety, optimal device performance, maximum runtime, and maximum lifespan. The current charge level can be checked via a 3-stage LED display. The housing is designed to resist dust, corrosion, and mechanical influences. The rubber coating provides high shock protection and a good grip. With the grip recess, the battery can be easily removed from all devices.