The M18 REDLITHIUM HIGH OUTPUT¿ HD12.0 Battery Pack provides 50% more power and runs 50% cooler vs M18 REDLITHIUM HD9.0 battery packs. The massive increase in power elevates the performance of the entire M18 system and drives the next breakthrough in M18 FUEL, generating the power of 15A corded product. 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.