The Dewalt DCB184 5.0Ah 18V XR Li-Ion Battery is at the very heart of getting the most out of your Dewalt 18V power tools. The lightweight design provides users with increased power and performance in a battery that is the same size as the 4.0Ah version. The battery includes protection internally to protect against overheating, overload and deep discharge, thereby increasing the life of the battery. The battery includes a built-in LED power gauge. Lithium Ion batteries carry no memory effect and virtually no self-discharge which results in maximum productivity of your work and your tool. The Dewalt DCB1104 XR Multi-Voltage Battery Charger has been designed to be used by any Dewalt 18V XR Battery as well as 12V XR Batteries. This also includes Dewalts POWERSTACK battery system. The charger can be wall mounted to aim with space management in workshops. The charger includes a charge indicator highlight the capacity of the battery when it reaches 80 and 100.