The MILWAUKEE® M18™ Dual Bay Rapid Charger charges battery packs up to 40% faster, reducing users downtime and maximizing productivity. The charger accepts all M18™ batteries and is able to charge two batteries at the same time. The 18-volt battery charger features REDLINK™ Intelligence, communicating directly with the user's batteries to monitor cell voltage, temperature and charge status to optimize their performance and extend the life of the user's pack. As an added level of communication, the lithium-ion battery charger indicates when the battery reaches an 80% charge, providing confidence that users can complete a substantial amount of work without waiting for a full charge. The MILWAUKEE® M18™ REDLITHIUM™ XC5.0 Two Battery Pack delivers up to 2.5X more runtime, 20% more power and 2X more recharges than standard lithium-ion batteries. The lithium-ion battery pack features superior pack construction, electronics, and performance providing users more work per charge and more work over pack life than any battery on the market.