This Milwaukee M18 5Ah Battery 2PK with Rapid Charging Station Bundle includes (1) 48-11-1852 and (1) 48-59-1807. The 2PK M18 5Ah Batteries delivers up to 2.5X more run time, 20 percentage more power and 2X more life than standard lithium-ion batteries. The M18 RedLithium XC 5.0 extended capacity battery pack features superior pack construction, electronics, and performance to deliver more work per charge and more work over the life of the pack than any battery on the market. The M18 RedLithium XC 5.0 battery features an advanced design, protecting the pack against harsh jobsite environments. This protection routes water away from the electronics and out of the battery pack, extends run time and life by minimizing heat, and prevents pack failures from vibration or drops. This unique to Milwaukee design also allows the battery to operate in extreme cold weather conditions below 0 deg. F/-18 deg. C. The Milwaukee M18 and M12 Rapid charge station is the fastest charging solution in the industry. With the ability to charge 6 packs 4X faster, the station charges three batteries simultaneously. The charger accepts up to 3 M18 and 3 M12 battery packs, reducing the amount of time spent changing out batteries and increasing productivity on the jobsite. Featuring Redlink Intelligence, the station communicates directly with the battery to monitor cell voltage, temperature and charge status to optimize the performance and extend the life of the pack.