Kickstart your cordless tool collection with this high-capacity 4.0Ah battery and rapid optimum charger set. Featuring STAR protection technology and an integrated LED fuel gauge, this kit ensures consistent power and optimized battery life even in extreme temperatures.

• Includes one 18V 4.0Ah LXT lithium-ion battery (BL1840B) and one 18V lithium-ion rapid optimum charger (DC18RC).
• Provides up to 35% more run time per charge compared to the BL1830 battery.
• Rapid Optimum Charger reaches a full charge in 40 minutes or less using smart communication technology.
• Integrated LED fuel gauge allows for easy monitoring of battery charge levels.
• Equipped with STAR protection computer controls to prevent overloading, over-discharging, and overheating.
• Built-in charger fan circulates air to cool the battery for faster, more efficient charging in hot weather.
• Engineered for durability with an impact-resistant outer case and shock-absorbing inner liner.
• Maintains consistent power in extreme temperatures, including as low as -4°F (-20°C).
• 16 contact terminals ensure a constant connection to prevent power loss during high-vibration applications.
• Resists self-discharge to ensure the battery is ready for use after long storage periods.