What Are Capacitors and Will They Really Charge Your Phone in Seconds?

Your phone died. Again. In these scenarios, who among us has not dreamed the dream of a future where our devices charge instantly and last forever. As capacitors—or even more exciting, ultracapacitors—get better and better at storing energy, they could replace batteries and realize at least one half of that dream. » 2/02/15 1:34pm 2/02/15 1:34pm

How to turn caves into giant batteries

How do we build a world that's less dependent on fossil fuels? One solution is right under your feet. Compressed Air Energy Storage (CAES) is a very boring name for a very awesome system that turns the Earth itself into a giant battery. Experts say it's one of the most cost-effective ways to store energy on a massive… » 3/16/12 7:00am 3/16/12 7:00am

Brown algae could help your smartphone keep its charge

We love our electronics, but the increasing demands of high end gadgets put a huge amount of stress on their Li-ion batteries, to the point where it's not uncommon to have to charge your smartphone every day, and your laptop every couple of hours. We keep waiting for the next big thing in batteries, but what might… » 9/09/11 11:30am 9/09/11 11:30am

New fuel cell could power your gadgets with energy from calories

Another day, another breakthrough in battery technology, guaranteed to change our lives. This one is powered by mitochondria, tiny organelles inside cells which could suck the energy out of anything with calories — like soda or oil. Sure it would be awesome, but we constantly hear of amazing battery breakthroughs, and… » 8/27/10 3:30pm 8/27/10 3:30pm