The Milwaukee Tool M18 Dual Bay Simultaneous Super Charger, No. 48-59-1815, can charge two M18 batteries at once to distribute power between bays for an ideal charging experience. The Cool-Cycle active cooling system provides high-speed cooling for less downtime and works for batteries with Cool-Cycle capability. Integrated hang holes on the charger allow for wall mounting, while an on-board LED indicator communicates charger/pack performance. Redlink Intelligence gives information on cell voltage, temperature, and charge status to optimize the performance and maximize the life of the pack.