The dewalt ni mh battery packs are a high capacity battery with 50 more run time than ni cd batteries but is the same size as a 20ah ni cd battery it has excellent electrical characteristics with long battery life and no memory effect highly efficient and robust in extreme applications and fits all existing dewalt 144 volt tools except li ion machines with slide on style batteries the dewalt de9503 battery pack has the following specification battery capacity 26ah battery chemistry ni mhvoltage