The first tests of electric traction on Berlin's standard gauge began on 1 May 1882, with overhead supply and in 1886 with batteries, were not very successful. Electric traction of standard-gauge trams in Berlin was definitively established in 1895. The first tram line with an overhead track supply ran in an industrial area near Berlin-Gesundbrunnen station. The first line in a more inhabited area operated with batteries for its first year; a catenary was installed four years later. In 1902, electrification with overhead wiring had been completed, except for a very small number of lines on the periphery.