Milwaukee m18 ccs66 502c fuel circular saw 18 volt features redlink plus intelligence system delivers the most advanced digital overload protection for tool and battery and uniquely enhances the tool performance under load red lithium ion battery pack delivers up to 25x more run time up to 20 more power up to 2x more battery life and operates better down to 20c than other lithium ion technologies individual battery cell monitoring optimises tool run time and ensures long term pack durability1