Utilize the input text as a context reference, choose the right relationship between iPhone and Foxconn from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

By the end of the year, according to Reuters, BYD should have 10 GWh of battery production capacity, which it expects to increase to 34 GWh by 2020 with a new factory in Brazil—about the same capacity as Tesla’s.Other Tesla rivals rushing to the battery production scene will be iPhone manufacturer Foxconn and LG Chem, which is already one of the top three battery makers.

Answer: manufacturer