The M18(TM) REDLITHIUM(TM) HIGH OUTPUT(TM) XC6.0 battery pack provides 50% more power and runs 50% cooler vs M18(TM) REDLITHIUM(TM) XC battery packs. The optimized combination of size and increased power provides a great solution for the entire range of M18(TM) products. It delivers fade free power and runs substantially cooler through heavy applications, allowing tradesmen to push their cordless tools harder and longer than ever before. The M18(TM) REDLITHIUM(TM) HIGH OUTPUT(TM) XC6.0 provides increased power in extreme cold weather conditions (below 0F / -18C) and delivers more work per charge, driving corded replacement on the jobsite. The REDLITHIUM(TM) HIGH OUTPUT(TM) XC6.0 battery is fully compatible with 150+ M18(TM) solutions. | Milwaukee Tool M18 REDLITHIUM HIGH OUTPUT XC6.0 Battery Pack 2 Pack