The DEWALT DCB2104-2 20V MAX XR POWERPACK 4Ah lithium-ion battery 2-pack is engineered to deliver high performance and dependable runtime for professional cordless tool applications. Each DCB2104 battery uses tabless cell technology to provide 50% more power and a longer lifespan compared to the DCB240 battery. The durable overmolded base helps resist jobsite wear and impact, while the LED state-of-charge indicator provides quick visibility to remaining battery power to help reduce interruptions. These XR POWERPACK batteries are part of DEWALT's best-performing 20V MAX battery lineup and are compatible with DEWALT 20V MAX tools.