The Einhell PXC battery twin pack 4.0 Ah consists of two universal 18 V rechargeable batteries from the Power X-Change series and offers twice the power for numerous potential applications. The universal batteries in the Power X-Change series can be combined with all devices in the PXC range, regardless of whether for tools or garden equipment. The lithium-ion cells offer more power with improved immunity to the typical problems that rechargeable batteries are so often afflicted by, including resistance to the common problem of self-discharge. The service life of these rechargeable batteries is extended significantly by adapting the charging cycles to the specific application situation. The proactive battery management system from Einhell maximizes the safety of the system, and in addition all the parameters of the battery are continuously monitored with state-of-the-art components. The charge status of the battery can be checked at a glance with a three-level LED system that provides a constant overview of how much power is left. In addition, the rubberized housing ensures a high level of protection against bumps and knocks and makes the batteries easy to grip. The molded, recessed grips make it incredibly easy to insert and remove the batteries.