Has anyone here tried this ? www.homepages.ihug.co.nz/~pcaffell/Battery_Maintanence_Tips.pdf New to me but apparently been around for a while. The various articles I've seen have never mentioned chemical desulphation Joe -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist