A peek into the automotive development hive mind. Group decision making on 36V battery terminals http://lees.mit.edu/public/Workgroups/Jumpstarting/2000-05-22/Schoener1.pdf Note possible 20 cycles lifetime for connector - 50 is better (!) Note that the preferred solutions prevent use of "crocodile clips". Understandable, but ... . Notice that they say one solution is less suitable than the rest, then ask questions about its possible cost advantage at the end. Russell -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist