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The simple, non-polluting battery could be used in compact devices.
Nanotube-filled capsules could restore conductivity to damaged electronics.
A California company’s lithium metal-air batteries are lightweight and energy dense.
A startup says its solid polymer electrolytes will mean cheaper, more-reliable batteries.
Combining different battery technologies could improve vehicle performance and reduce costs.
Nanoporous silicon that soaks up ions without self-destructing can make better batteries.