The DeWalt DCB184LR 18v XR Cordless Li-ion Battery 5ah features a lanyard attachment to protect your batteries and tools while working at heights by making sure they can be attached to the user at all times. The battery delivers 66% more runtime than a 3.0Ah battery and also featuring an LED state of charge indicator which helps the user know how much power is left in the battery. Specifications • Battery Capacity: 5.0 Ah • Voltage: 18 V Features and Benefits • Delivers 66% more runtime than a standard 3.0Ah battery pack • Protection against overheat, overload and deep discharge conditions increases battery life • LED State of Charge Indicator helps manage pack charging • Features a lanyard attachment to protect your batteries and tools while working at heights