This Rapid Fast Charger from Milwaukee will charge all M18, M14 and M12 REDLITHIUM battery packs The Milwaukee M12-18FC Rapid Fast Charger is perfect for charging your M12, M14 and M18 batteries. It charges 2.0Ah, 4.0Ah, 5.0ah, 6.0Ah and 9.0Ah battery packs and can charge an M12 and M18 at the same time. Its REDLINK technology intelligently communicates with the battery pack to monitor cell voltage and temperature. It also optimises performance and protects and extends the life of your battery packs. Features:   Sequential charging  Charges all Milwaukee batteries up to 40% faster  Recharges all M18, M14 and M12 REDLITHIUM-ION battery packs  M12 REDLITHIUM-ION 2.0Ah/4.0Ah battery packs recharge in 28 min/57 min or less  M18 REDLITHIUM-ION 2.0Ah/4.0 Ah/5.0Ah battery packs recharge in 26 min/47 min/59 min or less  Recharges in sequence - first in, first to charge - resulting in less time needed to manage charging cycles  REDLINK intelligence communicates directly with the battery, monitors cell voltage and temperature and charges to optimise the performance, protect and extend the life of the battery   Specification: Charging ports: 1x M12 & 1x M18 Charging time: 26/50/52/95 minutes Charging time: 26/52/59/36/60/87/130 Battery pack capacity: 2.0, 4.0, 5.0, 3.0, 5.5, 8.0, 12.0 Ah