What is the difference between the CMCST900 and the CMCST910? Wilson October 03, 2020 20:01 The 900 is auto feed with a 2.0AH battery replacement spool CMZST065 (CMZST0653) The 910 is push button feed with a 4.0Ah battery replacement spool CMZST080 (CMZST0803) Related articles What is the warranty on the TSA4524 work bench? How can I open my locked tool chest? What is the part numbers and sizes for the Craftsman trimmer line? Comments 0 comments Please sign in to leave a comment.