This genuine manufacturer-sourced component which is specially designed for use with DeWALT power tools. The 14.4 Volt battery is utilized to power the tool, unfortunately, over time batteries will become weaker and eventually will not provide enough power to operate the tool as it was designed. Several factors can cause this, such as imp...Read moreroper charging or the way the tool is used along with normal deterioration of the battery. Please make sure to refer to the owners manual of your model for the correct application of this battery. Keep in mind this high-quality item is sold individually.