Makita® 18 V Lithium-Ion is the world's largest cordless tool line-up powered by an 18 V Lithium-Ion slide-style battery. At the heart of the LXT® Series is the 18 V LXT® Lithium-Ion battery and the efficient Rapid Optimum Charger. The new 18 V Lithium-Ion Dual Port Rapid Optimum Charger (DC18RD) charges two batteries simultaneously, giving tool users unparalleled charging efficiency so their batteries spend more time working and less time sitting on the charger. The 18 V Dual Port Rapid Optimum Charger offers key advantages for Makita® 18 V Lithium-Ion cordless tool users. The exclusive built-in fan cools the battery by forcing air through the battery's air vents during the charging process for faster charging. The charger communicates with the battery's built-in chip throughout the charging process to optimize battery life by actively controlling current, voltage and temperature.