The StrikeMaster Lithium 40V Battery is a replacement battery for StrikeMaster augers. In addition to replacing a worn-out or old battery, the StrikeMaster 40V Battery can effectively double your auger's drilling capacity by providing a second, fully-charged battery. An Internal Battery Management System maintains even power until the charge runs out, ensuring your auger cuts reliably all day long. Plus, the StrikeMaster 40V Battery has a four LED light battery status so you'll know when it's time for a recharge.