>
> Discharge the battery to a resistor and measure the dU/dI after a few
> charging cycles. The impedance value will change. The value of the resist=
or
> is usually chosen for the battery rated current.
>
> I have been struggling with dU/dI and have come to the conclusion that yo=
u
intended to say dV/di i.e  change in voltage against change in current.

I might do this as an experiment.  At 10 sec intervals measure V and I
(annoying that capital i looks the same as a lower case l as in level ) and
plot the delta's.

Justin
--=20
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