On Sep 22, 10:09*am, "Dave Plowman (News)"
wrote:
In article
,
* *harry wrote:

A battery is a fuel too. It is chemical energy. *It converts chemical
energy to electricity.

It *stores* energy, if you're talking about a rechargeable type. A dry
cell creates it.

Energy can't be created or destroyed, just converted from one form to
another.

And the efficiency of that conversion is all important.


All cells are theoretically rechargeable. Just there are practical
difficulties with some. Eg, gases produced escape. The chemicals
migrate,, Polarisation.

The energy has to be "put into" the chemicals when cells are
manufactured.
You don't get anything for nothing.