Upgrade your cordless tool performance with the Milwaukee M18 REDLITHIUM XC5.0 Starter Kit engineered to deliver up to 2.5X more runtime 20% more power and 2X more recharges than standard lithium-ion batteries. This advanced 5.0Ah lithium-ion battery pack features robust construction and cutting-edge electronics ensuring maximum efficiency and durability on the job site. Designed for heavy-duty applications the REDLITHIUM XC5.0 battery runs cooler performs reliably in extreme temperatures (down to -18?C/0?F) and resists damage from water vibration and drops. Its integrated REDLINK Intelligence safeguards against overloads and over-discharging protecting both the battery and your Milwaukee M18 tools. With individual cell monitoring and a temperature management system this battery maximizes lifespan and performance. The kit also includes a versatile M18 & M12 multi-voltage charger making it a complete power solution for professionals and DIYers alike.