The Milwaukee M12-18FC Dual Fast Charger recharges all M18™, M14™ and M12™ REDLITHIUM™ battery packs. It recharges in sequence - first in, first to charge - resulting in less time needed to manage charging cycles. This charger is perfect for charging your M12, M14 and M18 batteries packs quickly. Ideal for professional tradesmen or DIY'ers that have Milwaukee batteries and power tools. 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 battery life of your M12, M14 and M18 battery packs. The M12 - M18 Fast Charger is a reliable and efficient solution for charging all M18, M14, and M12 REDLITHIUM batteries. Its sequential charging system prioritizes the first battery inserted, minimizing overall charging time. Designed for versatility and speed, it charges batteries of various capacities in under 26 to 95 minutes, ensuring optimal performance and reduced downtime. M18, M14, and M12 REDLITHIUM batteries. Charges M12 and M18 batteries in as little as 26 minutes. M12 REDLITHIUM-ION 2.0 Ah / 3.0 Ah / 4.0 Ah / 6.0 Ah battery packs recharge in 28 min / 45 min / 57 min / 90 min or less. M18 REDLITHIUM-ION 2.0 Ah / 4.0 Ah / 5.0 Ah / 6.0 Ah / 9.0 Ah battery packs recharge in 26 min / 47 min / 59 min / 68 min/ 95 min or less.