The Makita DC18SH Twin 14.4v -18v Li-ion charger offers the ability to charge 2 batteries simultaneously. The double charger comes into the range alongside the Makita DC18RD and makes use of Makita's rapid charge technology. This selects the correct voltage output as well as managing temperature by the air cooling system that circulates air through the battery, preventing it from overheating. During charging, the charger constantly communicates with the battery - using the data stored in the battery's memory, the charger processor itself analyzes and decides about the optimal method of charging. Features Optimizes battery life by actively controlling current, voltage and temperature Twin charging ports Electronic current limiter for overload protection The charger's main processor analyzes data from the battery's memory Charging LED indicators Can charge 2x LXT batteries at the same time, and as fast as the DC18SD chargers a single battery DC18SH Charge Times 6.0Ah LXT: 130 Mins 5.0Ah LXT: 110 Mins 4.0Ah LXT: 90 Mins 3.0Ah LXT: 60 Mins 2.0Ah LXT: 45 Mins 1.5Ah LXT: 30 Mins