Are the 20 v units interchangeable with the older 19.2 model units? Support June 01, 2023 14:44 Updated No, they are not interchangeable as the design is different.For additional questions, please contact Customer Service through chat, form, or phone: 888-331-4569. Related articles Where can I locate a manual or parts for my tool? Where can I locate information about my lubricants? Where can I locate information about my electric cord? Comments 0 comments Please sign in to leave a comment.