The powerful DeWalt DCB184-XJ 18V 5.0Ah Li-ion XR slide pack battery is fully compatible with all DeWalt 18V Li-ion tools, and delivers outstanding run time thanks to the XR intelligent switching electronics module. Output is also efficient, meaning your tools can work for longer. The XR technology protects the battery from potentially damaging effects such as overheating or overload. The battery can also be used with the DeWalt multi-voltage charger, so you don't need to worry about running out of power on big jobs.