Next-gen battery charging technologies on display at Mobile World Congress
A man looks at his mobile device as he walks during the Mobile World Congress in Barcelona on Feb. 24.
BARCELONA, Spain -- Some promising new technologies for smartphone charging are among the important, if relatively low-profile, exhibits at a mobile device trade show now taking place in Barcelona.
These technologies, on display at this year's Mobile World Congress here, seem to represent key new trends in the ways mobile devices are charged.
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