HPJ [Highpower International] 8-K: (Original Filing)
[SAN DIEGO, CALIFORNIA and SHENZHEN, China, April 2, 2018 /PRNewswire/ -- Highpower International, Inc. (NASDAQ: HPJ) ("Highpower" or the "Company"), a developer, manufacturer, and marketer of lithium ion and nickel-metal hydride (Ni-MH) rechargeable batteries, battery management systems, and a provi]