The M18 REDLITHIUM-ION HIGH DEMAND 9.0Ah Battery Pack delivers up to 5X more run-time, 35% more power, and runs 60% cooler than M18BX. The battery is best optimised for high draw products and sustained run-time applications, and it provides the next, large step towards full corded replacement when paired with the M18 system of solutions. It maintains full power and runs substantially cooler through heavy applications, allowing users to push their cordless tools harder and longer than ever before. The M18 REDLITHIUM-ION HIGH DEMAND 9.0Ah battery is fully compatible with 150+ M18 tools. Important Safety Notice - Click Here