Thanks again Mark. I think the break has to do with how fast the motor stops when you shut it down. The choices are "no break" "soft break" "medium break" and "hard break". It comes preset to soft break. It has a bunch of programable settings. Most have factory presets except for the the number of cells. Cut off voltage is set to factory standard when you select the number of cells, but it can be changed. Thanks again for your help.