The Gorse Fox's Samsung Netbook is back. The Mr Fixit ordered a second new battery and that too failed to charge. He then swapped the battery with another Netbook he had hanging around - the alternate batter worked and charged fine in GF's machine; the new batteries failed to charge in either. The problem is evidently with the batteries.
Mr Fixit gave GF the alternate battery and Sammy is now home and happy.