The Einhell PXC 4x 4.0Ah Starter Kit & Twincharger Kit is for universal use featuring 4x 4.0Ah PXC batteries & 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 the self-discharging. Impact protection and a good grip are provided by the rubber-coated housing + recessed handles. The parallel charging gets two 4,0Ah 18 V batteries in 75 minutes ready for action again. Charging cycles are adjusted to the situation, so the batteries have a longer service life. Info on the battery status is provided by the 3-step LED system + detailed charging status display. Einhell Power X Change 18v Lithium Ion 4.0ah Battery Power X-Change is the rechargeable battery system from Einhell. It is designed for multi functionality. With this advanced technology, you can use 18V rechargeable batteries with different capacity