Milwaukee. M12 FUEL features a POWERSTATE Brushless Motor, REDLINK PLUS Electronic Intelligence, and REDLITHIUM Battery Technology. Providing longer motor life, more run time, and more power. The POWERSTATE, brushless motor reduces noise and cools rapidly to deliver years of maintenance-free performance. The M12 REDLITHIUM XC4.0 Battery provides more runtime than standard Lithium-Ion batteries. REDLINK PLUS Intelligence hardware and software is the world’s most advanced system of cordless power tool electronics that will maximize performance and protect your investment.