The Chinese-made taptic engine, which mimics the sensation of being tapped on the wrist, proved to be defective so Apple switched to a different supplier, according to The Wall Street Journal.
A dissection of the watch by researcher IHS shows that a relatively low cost for parts could add up to more money for Apple.
The patent may hold up the launch until December, when it expires, according to Swiss broadcaster RTS.
A much-rumored 12.9-inch iPad won't go into production until the fall, sources tell Bloomberg.
Revenue in China helps boost the company to a record second quarter, but the iPad remains a weak spot for Apple.
The company says it needs more time to file its quarterly report because certain computer systems won't be back online until next month.
The PlayStation 4 was due to go on sale there this coming Sunday, but Sony is still negotiating with authorities.
Technology in the Avengers movies always seems to work flawlessly. But what if it didn't? In "The Avengers: Age of Technical Difficulties," Nick Fury has to deal with failing technology.
FCC Chairman Tom Wheeler, who had promised to deliver proposed new rules for managing Internet traffic, may be finding the task more complicated than anticipated, The Wall Street Journal reports.
The electric-car maker also says problems upgrading the assembly line reduced production of the Model S and forecasts 2,000 fewer units will be delivered this year.