This twin pack contains two Einhell Power X Change 18v 4.0ah lithium ion batteries. The batteries can be used to power two separate 18v Power X Change tools or they can be combined to power one 36v (2x18v) Power X Change tool. Each battery features a three stage LED charge indicator so you can easily check how much charge is left in a battery at any time. Specifications • Battery Voltage: 18v • Battery Type: Power X Change Lithium Ion • Battery Capacity: 4.0ah • Battery Quantity: 2 Features & Benefits • Compatible with all Power X Change tools • Suitable for Twin-Pack use in 36v Power X Change tools • Three stage charge indicators • Impact protection and good grip thanks to rubber-coated housing • Trough handle for easy removal • Housing protected against dust, corrosion and mechanical damage