Quattro Micro Battery Charger employs the circuit that features four totally independent but identical power outputs which are powered 4W each. It is designed for charging single cell LiPo which are commonly used by micro drones. Insert the lead to the right connector in each port,the charger will charge 4 batteries at the same time. And the charging current can be adjusted from 0.1-1A by dial,the charging capacity and cell voltage can be displayed in each 4-digital LED Indicators.