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Apple's Fuel Cell Batteries To Power MacBooks and iPhones For Weeks

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Apple is working on batteries that could power its MacBooks and iPhones “for weeks”, according to new patent documents.
The company has detailed new plans, apparently for its laptops, that could use a “fuel cell system” to dramatically expand the battery life of the devices. And when they have run out, users could just swap them out for a fully charged one.
The plans relate to a technology that could keep laptops going “for days or even weeks”.
Apple doesn’t suggest exactly how the fuel cells would work, apparently keeping its options open for a range of technologies that are currently being developed.
Unlike lithium-ion batteries, fuel cells combine an oxidizing agent such as oxygen with a fuel such as hydrogen to produce electricity and emit a negligible amount of heat and water vapor in the process. They can produce more energy than lithium-ion batteries of the same size. Apple's patent includes several potential fuels, including sodium borohydride, water, lithium hydride and others.
A downside of the technology is that it makes use of disposable cartridges that have to be removed and replenished once they run out of juice, presenting a potential inconvenience to users accustomed to plugging in at the end of a work day. The cartridges may also be of a size not conducive to increasingly slimmer MacBoooks.
Read More at  thehackernews.com/2015/09/apple-iphone-mackbook-battery.html
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