The charger fully recharges 64 V max. Makita batteries with 4.0 Ah in 120 minutes. The batteries are simply placed on the charger and lock into place with a hook that must be pressed to remove the battery. Two LEDs provide a visual indication when a charge of 80% and a full charge of 100% is reached. Once the battery is inserted, the color of the charge indicator changes from green to red, and the charging process begins. The charge indicator remains lit continuously during the charging process. A red charge indicator lights up when the charge level is between 0-80%, while both a red and a green light illuminate when the charge level is between 80-100%. The aforementioned 80% indicator is an approximate value. When the charging process is complete, the red and green charge indicators change to a green light. The charging time varies depending on the temperature (10 °C - 40 °C) at which the battery is charged and the condition of the battery (e.g., new or unused for an extended period). Features: Length of power cable: 2 m.