Scott Walsh wrote:
>
>      Doing the measurement every 10s or so at 0.1C discharge, is not a
>      problem for me. I have a 650mAh battery pack being discharged at 60mA
>      is this 0.09C ?
>
>      So if you do use this method, what is the change in voltage between
>      each 10s sample that you use to indicate a battery that is failing?
>      Eeek, hold on, I know this depends on the number of cells in your
>      battery, but hit me with the info anyway? I have three NiMH cells!
>
>      kind regards,
>      SW.

Whoa! NiMH is not NiCd! Therefore the charge/discharge curves are not
the
same.

To give you some indication for NiCds, if you take the difference as a
percentage of the starting voltage, over 95% is full, and below 50%
becomes dicey.

I haven't tried it on NiMH cells, but it would be interesting to see how
well it works.

--
Friendly Regards

Tjaart van der Walt
mailto:tjaart@wasp.co.za
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