General description Einhell Power X-Change 18V Lithium Ion 4.0Ah Battery Twin Pack is designed for multi-functionality, allowing you to use 18V rechargeable batteries with different capacity ratings across the entire Einhell Power X-Change range. This advanced battery system features a robust design, ensuring high performance and reliability for all your cordless tools. Technical specifications Battery type: Lithium Ion Voltage: 18V Capacity: 4.0Ah Weight: Not specified Dimensions: Not specified Charging technology: Microprocessor-controlled LED battery control: 3-step indicator Compatibility and accessories Compatible with all Power X-Change rechargeable devices Suitable for TWIN-PACK use in power demanding 36V applications Usage No memory effect: Can be recharged at any time No self-discharge: Ready for immediate use after storage Impact protection and good grip due to rubber-coated housing Triple shell design for optimum protection against damage Other information Charging process