Guangzhou Great Power Energy and Technology (SHE:300438) expects to post first-half net profit attributable to shareholders of between 800 million yuan and 866 million yuan, according to a Wednesday disclosure on the Shenzhen bourse.
The Chinese lithium-ion battery manufacturer's shares slumped 10% at the close of Thursday's trade.
The attributable loss a year earlier was 88.2 million yuan.
The company attributed the forecast to higher production, orders and sales, leading to an increase in its operating revenues.