RichA wrote:
On Friday, 9 September 2016 21:06:10 UTC-4, ray carter wrote:
On Fri, 09 Sep 2016 17:16:35 -0700, RichA wrote:

http://phys.org/news/2016-09-applica...apacitors.html

A year or so ago, aluminum ion batteries were mentioned. As I recall,
higher energy density than litium cells.

Battery technology must be a lot more complex than it seems because real breakthroughs in performance are rare.



Many modern gadgets need a high current flow = a lot of heat is
produced. When mechanical cameras just needed a couple of button cells
for the metering, the current drawn was tiny.

Mort Linder .