Lithium-ion battery powers Milwaukee M18 cordless tools. Provides up to 2X more run-time， 20% more power， and twice the recharges compared to a standard lithium-ion battery. Features REDLINK intelligence overload protection to prevent damage to power tool in heavy-duty situations， and discharge protection prevents cell damage. Temperature management system and individual cell monitoring help maximize battery life. Operates cooler in extreme job site conditions and performs in climates below 0 degrees Fahrenheit with fade free power. Displays remaining runtime for less downtime on the job.