> Perhaps limiting heat transfer out of the pack (insulation) > would exaggerate dT at low C. Perhaps, but heat can damage the battery. Also it seems the voltage blip can't be relied on, so an alternative termination strategy needs to exist anyway. ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, olin@embedinc.com, http://www.embedinc.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body