At 10:28 PM 10/2/2004, csb wrote:

>Hi,
>I just got a few NiMH cells that I'd like to make into a battery pack. The problem is that their voltages range from .75 to 1.1V each (they were used before). Is there a better way to charge/discharge them to a uniform voltage than just connecting a resistor and watching the voltage go down?

As long as they are roughly the same age, and they are the same nameplate capacity, I wouldn't worry about it.

A 10 ohm resistor is a perfectly good discharger for a single cell, and you can discharge a cell to 0V without permanent damage.  It's not really needed though.


You might try series connecting them, and charging at C/10 for 15 hours.
That's a little bit of slow overcharge, and it should equalize the cells.

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