Intelligent charger designed for all types of 14.4V (4 cells) Li-Ion Battery packs including Polymer Li-Ion and Cylindral Li-Ion. Worldwide input AC power from 110V --- 240V. 1500 mA (1.5A ) constant charging current for faster charging, save your much more time. Charging time for 4000mAh battery pack is about 2.6 Hrs. ( Please use it to charge Li-Ion battery with capacity > 1500mAh) Built in IC to cut off power automatically when battery is fully charge. Red Lead will show Battery in charging and Green LED shows full. (Green LED also is ON when no battery is connected). Two pins male connector is for connecting to Li-Ion battery pack One 5' cable with male connector is included , which allow you connect it to a battery pack and fits with the smart charger.