Milwaukee 48-11-2401 Genuine OEM M12 REDLITHIUM 12 Volt 1.5 Amp Compact Lithium Ion Battery with Overload Protection for Cordless Power Tools FADE-FREE POWER: Whether the battery is at 2% or 99%, it will run as though it were fully charged EXTREME TEMPERATURE PERFORMANCE: These batteries can function below 0 Degrees Fahrenheit (-18 Degrees Celsius) M12 COMPATIBLE: This battery will work with the M12 line of 12V Milwaukee tools, powering such items as the sub-compact circular saw and 12V LED area light OVERLOAD PROTECTION: Redlink intelligence built into the battery lets it communicate with the power tool it charges, preventing it from overheating and damage from COMPACT SIZE: You can have the power of lithium ion batteries while having them weigh 65% less and be 50% smaller than compact NiCad batteries. Work harder for longer