On Fri, 15 May 2009 15:36:21 -0700, David Nebenzahl
wrote:

On 5/15/2009 3:19 PM Red Green spake thus:

"Stormin Mormon" wrote in news:gukmr0
:

The battery chargers I've used, the DC output goes through
diodes. So, discharge isn't an issue.

From what I recall from long ago, all diodes have a leakage current rating.
Whether it's significant in this case I don't know.

They all have a leakage current rating; the leakage is very, very small.

FAIK, the old Si/Ge diodes may be obsolete in today's electronics.

Si/Ge? You mean one or the other; modern diodes are all silicon, except
for a few small-signal ones (1N34, etc.). Not used in battery chargers,
that's for sure.

And of course before that there were selenium and copper-oxide
rectifiers, both long obsolete.


Shottky are becoming more common due to their lower voltage drop
(forward). Half a standard silicon diode drop. (like germanium)