The Milwaukee RedLithium™ XC5.0 Extended Capacity Battery Pack delivers up to 2.5 times more run time, 20% more power and 2 times more life than standard 18V Lithium-ion batteries. The M18 RedLithium XC5.0 features superior pack construction, electronics and performance to deliver more work per charge and more work over the life of the pack. Advanced design protects the pack against harsh jobsite environments, routing water away from the electronics and out of the battery pack. Extends run times and life by minimizing heat and prevents pack failure from vibration or drops. Unique Milwaukee design also allows the battery to operate in extreme cold weather conditions (0° to -18°F). RedLink Intelligence features overload protection to prevent damage to cordless power tools in heavy-duty situations, while discharge protections prevents cell damage. Fully compatible with any M18 cordless power tool.