Milwaukee designed and built brushless powerstate motor for up to 2x longer motor life and up to 25 more power features and benefits 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 second hardest hitting sd