THIS CHARGER IS A 4-PORT FAST CHARGER THAT CHARGES 12-VOLT MAX AND 20-VOLT MAX BATTERIES AT THE SAME TIME. THIS FAST CHARGER QUICKLY CHARGES A 4.0AH 20V MAX BATTERY IN 40 MINUTES AND A 6.0AH 20-VOLT MAX BATTERY IN 60 MINUTES. IT IS ALSO DESIGNED TO FIT OUR TOOL CONNECT TAG AND IS TOUGHSYSTEM COMPATIBLE. WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65warnings.ca.gov -