Brian X. Chen scored a few Apple Watch scoops:
Inside Apple, members of the team that worked on the watch
product, code-named Gizmo, say it was a difficult engineering
challenge. Three employees briefed on the project agreed to speak
on the condition of anonymity. […]
Apple has said the watch battery is estimated to last a full day,
requiring a user to charge it at night, similar to a smartphone.
The company also developed a yet-to-be-announced feature called
Power Reserve, a mode that will run the watch on low energy but
display only the time, according to one employee.
Apple will release the watch a bit later than it had hoped because
of technology challenges. It probably didn’t help that several
important employees jumped ship. Nest Labs, the smart appliance
maker that was acquired by Google last year, poached a few
engineers who were the very best on the watch team, according to
two people. Among them was Bryan James, Apple’s former director of
iPod software, who became a vice president for engineering at Nest
in early 2014, these people said.