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Nanotube anodes could lead to higher-energy, faster-charging batteries for cell phones and notebooks.
Portable electronics could run 40 percent longer using a new type of anode.
A startup says its solid polymer electrolytes will mean cheaper, more-reliable batteries.
Nanoporous silicon that soaks up ions without self-destructing can make better batteries.
A new printing process could increase battery capacity by over 10 percent.