The battery might be the least sexy piece of technology ever invented. It isn't just boring. Frankly, they kinda suck. At best , the batteries packed into smartphones and computers and cars. At worst, they are expensive, heavy, combustible, ?complicated to dispose of probably, and prone to dying in the cold or oozing corrosive fluid.

Even as the battery becomes slimmer and smarter, batteries are still waiting for next upgrade.

Computer processors famously double their capacity every two years.

Nevertheless, The future will be battery powered, it has to be, from electric cars to industrial scale solar farms, batteries are the key to a cleaner, more efficient energy system. The sooner we get there, the sooner we can stop contributing to potentially catastrophic climate change.

Most lithium ion aren't good enough. They are powerful in our devices, but when you scale them up for a larger jobs like powering a house, they are liable to overheat and even explode.

Perhaps the biggest problem with batteries is that they wear out, they need replacing. It spent a few years draining ?to 1 percent then charging back up to 100. That kind of deep discharge and recharge takes a physical toll and damages a battery's performance over time.

So we are overdue for a brand new battery, and researchers around the world are racing to give us ?one, with competing approaches and technologies vying for top spot. Batteries whose secret ingredient is saltwater.

Man s brain maybe compared to an electric battery.

A group of electric battery will provide more energy than a single battery.