A New York Times report is providing more fodder for iWatch speculation, including the purported use of solar power.
This could conceivably involve the use of a charging plate.
Another method to juice up the watch may be to integrate a solar-charging layer in the screen, according to the report.
Yet another involves "charging the battery through movement, a method that is already used in many modern watches," the Times reported. "A person's arm swinging could operate a tiny charging station that generates and pushes power to the device while walking." Apple filed a patent for the technology in 2009.
The impetus for alternatives to the traditional battery is rooted in the fact that a smart watch powered by a sophisticated processor would run out of juice too soon to entice consumers.
In the story, the Times cited Nest co-founder and "one of the fathers of the iPod" Tony Fadell, saying Apple tried for "many years" to build a smarter battery with, for example, solar charging but failed.
The report also repeated previous rumors of a curved glass display.