Dale Botkin wrote:
>
> On Wed, 24 Jan 2001, Alan B. Pearce wrote:
>
> > > And remember that nimh lose 10% of their charge per day on average.
> > >
> >
> > >Is this really true? I bought NiMh AAA batteries for
> > >a device I use, as these had higher capacity than
> > >the equivalent NiCd batteries. But this device only gets
> > >used every now and then...
> >
> > yeah I was wondering that too. 10 days shelf life from charge? does not really
> > sound right to me. I would have thought nearer 1% worst case, and that is still
> > less than a 1/3 of a year.
> >
> > I do not have expertise with these but 10% does sound somewhat off as a figure.
>
> If my cellular and laptop NiMH batteries are any indication, I would not
> be surprised at 5% at least, maybe higher.  The self-discharge really does
> become a problem.

Try taking them out of the device. With my walkman I
found that they go flat in a few days if left in,
but last for weeks when not in the device. I think
NiMh have poor performance with very low currents
like the device standby current?? Maybe that is partly
responsible for the rumours of high self-discharge
rates?
-Roman

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.