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Posted by on September 14, 2006, 7:03 am
only have 1 real comment to make here, the last point of what to do
now.
go buy a rigid from home depot
not as good as dewalt, milwalkee, or porter cable, but free replacement
batteries for life makes a big advantage for the rigid brand name.
Empress2454 #124457
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Bankerjohn wrote:
> I purchased a 12V Makita drill (6216D) about 2 years ago. It came with
> two of the gray 2.2Ah Ni-MH batteries and a charger (DC1411). From the
> very beginning, it did not seem to me that the batteries were holding a
> charge very well. I could charge a battery until the green light came
> on, remove the battery put it in the drill ... and come back 2 weeks
> later and there was very little power left in the "fully charged"
> battery.
>
> I previously owned a Craftsman Professional 9.6V drill with NiCad
> batteries (which I suspect were nowhere near 2.2Ah) ... and it would
> hold a charge for several months. I think I've read that Ni-MH
> batteries will lose their charge quicker than NiCad batteries ... but I
> wouldn't expect a "fully charged" battery to lose most of its charge in
> 2 weeks!
>
> My problem now is that I can't seem to get either of the Makita
> batteries to fully charge. I've tried only leaving the battery in the
> charger for an hour ... and I've tried leaving it for a week. Neither
> way seems to fully charge the battery. One thing that seems strange ...
> after charging a battery for a couple hours, I can remove the battery
> ... wait a few minutes ... and then plug it back in to the charger ...
> and the blinking green light turns red and stays red like it is doing a
> full charge cycle. (I have not timed it to see how long it stays red,
> although I suspect it's not very long.)
>
> So ... my questions:
>
> (1) could the charger have been "bad" from the very beginning?
> (2) is there anyway to rule out the charger as the problem with a v/o
> meter?
> (3) is it more likely that the batteries are "bad" (and maybe were from
> the beginning)?
> (4) what's my best course of action to diagnose my problem?
>
> One last question ... does it harm the battery or the charger to leave
> a "fully charged" battery connected for weeks?
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