On Mon, 4 Jul 2005 [EMAIL PROTECTED] wrote:
I've been looking around for this info and throught someone on the list must
know:
Google on nimh discharge curve for plenty of info
1) What is the full charge voltage for a AA NiMH battery? I'm guessing
about 1.275v, since the pack of 8 I just got for my K1 had a starting
voltage of 10.2v or thereabouts.
That appears to be correct.
2) At what voltage is it recharge time? The pack has dropped to about
9.8v after about 6 hours, seems to be still going strong.
Depends, 9V is probably a good point. Also, you don't need to wait for
them to be discharged before recharging. Shallower discharges tend to
result in longer service life.
3) I have a solar panel that puts out 250ma in full sun. Since these
batteries are rated 2000mah, can I just hook the pack up to the solar
cell to charge. I've done some reading and that seems to be the
conclusion, but somehow it seems too easy.
Not recommended. There are some small charge controllers out there, but a
relay configured to open when the battery reaches full charge is the
simplest. If the rated current on the solar panel is less than 3% of the
battery rating you can get away with a direct connect, but this is
basically a maintenance charge.
Thanks for the help
Mike N2HTT
Hope that helps,
Clark B. Wierda, [EMAIL PROTECTED]
N8CBW
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