I read in sci.electronics.design that René wrote
(in ) about 'PC CPU fan', on
Tue, 4 Oct 2005:

And now I will go on with my design of a battery charger that cuts off
the charging process based on weight increase of a charged pack.

Don't forget to correct for the buoyancy of the evolved hydrogen.
--
Regards, John Woodgate, OOO - Own Opinions Only.
If everything has been designed, a god designed evolution by natural selection.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk