The Makita DC18RD is Twin port fast charger designed to charge two Makita slide style Li-ion and Ni-MH batteries (with adapter) at the same time. Can also be used for charging USB device from the USB port on front of unit. Charge Times: 2 x 18v 3.0ah Batteries in 22 mins, 2 x 18v 4.0ah Batteries in 36 mins, 2 x 18v 5.0ah Batteries in 45 mins.

Features and Benefits
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
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