Milwaukee m18 redlithium xc 5.0 ah battery pack delivers up to 2.5x more runtime, 20% more power, and 2x more recharges than standard lithium-ion batteries. 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 market. Rechargeable battery also delivers users 5.0 amp-hours of runtime. Each battery pack is durably built for heavy-duty use, runs cooler, and performs in climates below 0°f/-18°c. This protection routes water away from electronics and out of battery pack, extends users' battery run-time and life by minimizing heat, and prevents pack failures from vibration or drops. Built-in redlink intelligence protects battery from overloads, preventing users from damaging ir cordless power tools in heavy-duty situations, while discharge protection prevents cell damage. An integrated temperature management system and individual cell monitoring help to maximize battery life. Switch toMilwaukee's redlithium xc5.0 battery pack to instantly upgrade runtime and durability ofMilwaukee m18 cordless tools.