BUZZ-Ballard Power Systems Inc: Says customer demonstrates world's first hydrogen fuel-cell tram
** U.S.-listed shares of Canadian fuel-cell maker up more than 13 pct at $2.45 before the bell
** Company says customer CSR Qingdao Sifang Co, a Chinese trail transport equipment maker, demonstrated world's first hydrogen fuel cell-powered fixed-rail electric tram at an event in March in China
** Ballard said its FCvelocity fuel cell module is integrated into the low-floor tram design
** Up to Monday's close, Ballard's stock had fallen 50 pct in the past 12 months
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