50 pieces. Dongguan Hongyutai Electronics Co., Ltd. was established on March 12, 2018. According to the box setting of Dongguan Hongyutai Company, the specification of a box is 50 pieces, so the mobile power supply of Dongguan Hongyutai Company has 50 pieces in one box. The company is located in Yurun Intelligent Manufacturing Industrial Park, Butterfly Road, Tianxin Village, Meitang Community, Huangjiang Town, Dongguan City.