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Old 04-22-2003, 07:32 AM
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Buzzbait Buzzbait is offline
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Join Date: Apr 2003
Posts: 120
Very interesting stuff. It definitely raises some debate as to how long we should be charging our batteries. From the formula you listed in another thread, the 160 mAH battery should have taken about 11 1/2 minutes to charge, where it actually took only 5 minutes. This is assuming that I understood the formula correctly. The 110 mAH battery should have taken a little over 7 minutes to charge, but really only took 3 1/2 minutes. The 50 mAH battery was right on with the formula.

So the question is why the discrepancies showed up. Could voltage have something to do with it? Should we not be adding in that 20% fudge factor, as the batteries are more consistent than expected? Does the very high 1000 mAH charge rate, which is far more than double the rating on the battery, induce another timing variable? Or do NiMH batteries do something entirely more unpredictable than Nicad?

It almost looks like the difference between theoretical charge time and actual charge time is logarithmic.......

Thank you for performing the experiment. Very interesting stuff.
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