Thanks to Tufts University and engineer Mike Zimmerman
. . . the world may have a highly efficient rechargeable lithium battery that is very safe, no more: exploding toys, burning cell phones or fires on board air craft. What is of even greater importance? Electric cars and large drones too.
The NOVA program segment can be found at this link:
“Replacing conventional lighting sources with LEDs with an efficiency of 200 lumens per watt would decrease the global electricity consumed for lighting by more than half. That reduction is equal to the electricity created by 230 typical 500-megawatt coal plants and would reduce greenhouse gas emissions by 200 million tons.”