Let's face it: every time your cellphone battery runs empty you feel amputated and you quickly run back to your house to connect to a powering-adapter. Bionic Power Inc. is now developing a knee-brace that can be used to charge small devices; the 5-watt electricity output from one knee generator is enough to power 10 cellphones at once.
via NewScientistTech.com, Related: Walking Energy Cells
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