This copy is for your personal, non-commercial use only. Distribution and use of this material are governed by our Subscriber Agreement and by copyright law. For non-personal use or to order multiple copies, please contact The Epoch Times Reprints.
While our gadgets these days are constantly getting smaller and more powerful, the development of commercial batteries both small enough and with sufficient capacity to feed their power-hungry demands has not quite kept pace.
There is a boom in renewable energy sources coming online worldwide, but the predominant types (solar, wind) are problematic due to their variable nature.
