a. Insert the charger in charging port without applying any pressure.b. The charging port can be found either on the battery or on the frame. c. Connect with the electric socketd. The LED light on charger will turn red.e. When the bike is fully charged, the light will turn greenf. If the charger is not connected or not properly inserted, the LED will remain green.g. WARNING DO NOT FULLY DRAIN THE BATTERY. MUST CHARGE WHEN AROUND 25 % LEFT.