Portable Chargers for Your Mobile Gadgets
IEEE Spectrum · 2012
The batteries in your smartphone, Bluetooth headset, tablet, and pocket digital camera are usually good for a full day-unless you’re using them a lot. Then, finding an AC outlet can be critical. There are a plethora of outlet-free solutions, and because the mobile electronics industry is finally making USB the standard for charging, thirdparty companies have been encouraged to innovate. Even Apple, which has eschewed USB sockets on its mobile products in favor of its own designs, uses a standard USB connector at the cable end that plugs into a computer or charger.