General description Einhell Power X Change 18V Lithium Ion 4.0Ah Battery is a versatile rechargeable battery system designed for multi-functionality. This advanced technology allows you to use 18V rechargeable batteries with varying capacity ratings to power any device within the Einhell Power X Change range. Technical specifications Voltage: 18V Capacity: 4.0Ah Battery type: Lithium Ion Weight: Compact and lightweight compared to NiCd batteries Other information Active Battery Management System (7-in-1) No memory effect - can be recharged at any time No self-discharging - ready for use after storage Sophisticated charging technology for short charging times and maximum battery life Consistent high performance throughout battery life 3-step LED battery control Microprocessor controls for optimal performance Rubber-coated housing for high impact protection and grip