HPJ [Highpower International] 8-K: (Original Filing)
[Highpower International Reports Unaudited First Quarter 2018 Financial Results SAN DIEGO, CALIFORNIA and SHENZHEN, China, May 11, 2018 /PRNewswire/ -- Highpower International, Inc. (NASDAQ: HPJ) ("Highpower" or the "Company"), a developer, manufacturer, and marketer of lithium ion and nickel-metal h]