The M18 REDLITHIUM HD 12.0 HIGH OUTPUT battery pack provides 50% more power and runs 50% cooler vs M18 REDLITHIUM HD battery packs. The massive increase in power elevates the performance of the entire M18 system and delivers the power of 15 amp corded product. It provides fade-free power and runs substantially cooler through heavy applications, allowing tradespeople to push their cordless tools harder and longer than ever before. The M18 REDLITHIUM HIGH OUTPUT HD12.0 is the best performing cold weather pack ever made, providing increased power in extreme cold weather conditions (below 0F / -18C). It provides the most work per charge of any professional power tool battery in the industry, driving full corded replacement on the jobsite. The M18 REDLITHIUM HD12.0 battery is fully compatible with over 150 M18 cordless tools and accessories.