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

Chargers - Makita UK

Makita LXT® is the world’s largest cordless tool system powered by 18V Lithium-Ion slide-style batteries. At the heart of the LXT® System is the 18V LXT® Lithium-Ion battery and the efficient Rapid Optimum Charger. The 18V Lithium-Ion Dual Port Rapid Optimum Charger (DC18RD) charges two batteries at the same time, giving tool users unparalleled charging efficiency so their batteries spend more time working and less time sitting on the charger. EFFICIENCY : (2) Built-in fans circulate air through the batteries during charging to cool the batteries Built-in fans circulate air through the batteries during the charging process to cool the batteries for faster charge time