HPJ [Highpower International] 424B5: Registration No. 333-217294 Prospectus Supplement, Dated April 9,

[Registration No. 333-217294 Prospectus Supplement, Dated April 9, 2018 (To Prospectus dated April 20, 2017) 50,000 shares of Common Stock Our common stock is listed on the Nasdaq Global Market under the symbol “HPJ.” On April 6, 2018, the last sale price of our common stock as reported on the Nasdaq]

HPJ [Highpower International] 424B3: (Original Filing)

[Registration No. 333-217294 Prospectus Supplement, Dated April 9, 2018 (To Prospectus dated April 20, 2017) Highpower International, Inc. Common Stock Preferred Stock Debt Securities Units This prospectus supplement amends the existing base prospectus that forms a part of the Registration Statement ]

HPJ [Highpower International] 424B3: Registration No. 333-217294 Prospectus Supplement, Dated April 9,

[Registration No. 333-217294 Prospectus Supplement, Dated April 9, 2018 (To Prospectus dated April 20, 2017) Highpower International, Inc. Common Stock Preferred Stock Debt Securities Units This prospectus supplement amends the existing base prospectus that forms a part of the Registration Statement ]

HPJ [Highpower International] 8-K: (Original Filing)

[Manatt, Phelps & Phillips, LLP April 9, 2018 Highpower International, Inc. Building A1, Luoshan Industrial Zone, Shanxia, Pinghu, Longgang, Shenzhen, Guangdong, 518111 People’s Republic of China Re: Registration Statement on Form S-3 Ladies and Gentlemen: 11355 West Olympic Boulevard, Los Angeles, C]

HPJ [Highpower International] 8-K: Manatt, Phelps & Phillips, LLP April 9, 2018

[Manatt, Phelps & Phillips, LLP April 9, 2018 Highpower International, Inc. Building A1, Luoshan Industrial Zone, Shanxia, Pinghu, Longgang, Shenzhen, Guangdong, 518111 People’s Republic of China Re: Registration Statement on Form S-3 Ladies and Gentlemen: 11355 West Olympic Boulevard, Los Angeles, C]

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