V G wrote: > The purpose is to make a battery charger/discharger/cycler/profiler. I > want to be able to accurately detect end of charge and "almost dead" > states using delta V. Plotting discharge curves would also show true > battery capacity. I did that a bunch of years ago as a one off project. See http://www.embedinc.com/pic/bat. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .