The Milwaukee 48-59-2425P M12 REDLITHIUM HIGH OUTPUT Battery Charger Starter Kit provides portable power and charging for Milwaukee M12 cordless tools. This kit includes one M12 REDLITHIUM HIGH OUTPUT XC5.0 Battery Pack and one M12 REDLITHIUM HIGH OUTPUT CP2.5 Battery Pack, both utilizing 12V Lithium-Ion technology. The XC5.0 battery offers a 5.0Ah capacity, while the CP2.5 battery provides a 2.5Ah capacity. These battery packs deliver 25% more power and run 25% cooler than standard M12 REDLITHIUM XC battery packs, ensuring fade-free power in extreme jobsite conditions, down to -18°C (0°F). Both batteries feature resistant housing designed for increased protection against common oils, greases, and solvents. The kit also includes an M12 Charger, which uses REDLINK Intelligence for optimized performance, overload protection, and total system communication between the tool, battery, and charger. This starter kit is compatible with over 150 M12 cordless solutions and has a total kit weight of 3.6 lb