Makita 18V Lithium-Ion batteries resist self-discharge so they’re ready for use even after long periods of storage. The Rapid Optimum Charger is a smart-charging system that communicates with the battery during charging to monitor current， voltage， and temperature. This advanced charging technology helps optimize battery life and deliver a faster charge. The 18V Dual Port Rapid Optimum Charger (DC18RD) charges 2 batteries simultaneously， giving tool users unparalleled charging efficiency so their batteries spend more time working and less time sitting on the charger.

For improved tool performance and extended battery life， Makita created Star Protection Computer Controls. Star Protection is communication technology that allows the tool and battery to exchange data in real-time and monitor conditions during use to protect against overloading， over-discharging， and overheating. Makita， the innovation leader in cordless tool technology， has the world’s largest cordless tool line-up powered by 18V lithium-ion slide-style batteries.

The Makita BL1850B2DC2 Features:

• 18V LXT Lithium-Ion 5.0Ah battery reaches a full charge in 45 minutes or less
• Provides up to 65% more run time per charge compared to BL1830
• Integrated L.E.D. battery charge level indicator allows user to monitor battery charge
• The battery delivers consistent power and run time in extreme temperatures， even in winter (-4°F/-20°C)
• Equipped with Star Protection Computer Controls to protect against overloading， over-discharging， and over-heating
• The impact-resistant outer case and shock-absorbing inner-liner are engineered to protect the battery
• Sixteen contact terminals maintain a constant connection with the tool to help prevent power loss or fluctuation， even during high-vibration applications
• Battery resists self-discharge and remains ready for use even after long periods of storage
• Compatible only with Star Protection tools， indicated by the Star Symbol and/or Yellow Battery Receiver under the tool
• Makita 18V Lithium-Ion is the world’s largest cordless tool line-up powered by an 18V Lithium-Ion slide-style battery
• The Makita Rapid Optimum Charger communicates with the battery’s built-in chip throughout the charging process to optimize battery life by actively controlling current， voltage， and temperature
• Charges two (2) 18V LXT Lithium-Ion 5.0Ah batteries simultaneously in only 45 minutes
• A built-in fan circulates air through the battery during the charging process to cool the battery for faster charge time
• Optimizes battery life by actively controlling current， voltage， and temperature