* Charge 4 batteries at the same time, It takes 80 minutes to complete a full charge of 4 batteries in total. Red light is charging, green light is fully charged. Includes charger, power cord and four battery cables, but no USB cables for remote control or smartphone. *Intelligent protection: the built-in safety system fully protects the charger from overcharge, over voltage, over temperature and short circuit * Battery charger with circuit protective IC in each charge socket Over charge protection, avoid high current damage your battery