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Researchers announced a new spray-on battery that could allow any object to become an electricity storage device. Scientists hooked a battery-sprayed ceramic tile onto a solar panel and were able to power an LED display for over six hours! Take a look at this great +Scientific American article:
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Tell the guy to spray it on a pencil and see if he can use it as a stylus for capacitive screen because we need some thin tip styluses for capacitive touch screens.

Good idea btw. The battery spray.
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