Sentence:  In February 1801 , Oersted did manage to experiment with physical apparatus and reported experiments made with a voltaic battery of 600 plates of zinc and silver and of later experiments with a <WSD>battery</WSD> of 60 plates of zinc and lead . 
Meaning of the word marked with <WSD> tags:  a device that produces electricity; may have several primary or secondary cells arranged in parallel or series