PENN CENTRAL <PC> SELLS U.K. UNIT SAFT, a unit of Cie Generale d'Electricite of France, said it bought U.K.-based Alcad Ltd from Penn Central Corp's Marathon Manufacturing Cos Inc. Terms of the deal were not disclosed. Alcad is one of the world's largest producers of pocket-plate nickel-cadmium storeage batteries, used in industrial and railroad applications to start engines and as light sources, SAFT said. SAFT said it expects to add 400 jobs at the U.K. operations.