Subject:
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Re: rechargeable 9V battery packs for RCX/JCX and Legos motors
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 31 Jul 2001 00:35:51 GMT
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Original-From:
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Brian B. Alano <alano@kivaNOMORESPAM.net>
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Viewed:
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648 times
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I use mostly use Rechargeable alkalines in my RCX. Sometimes NiMH. Never NiCd.
A lab might get the best mileage out of NiMH since they seem to care least of
the rechargeables about whether they get discharged to much (alkalines) or too
little (NiCd). The downside is they have to be charged right before use, which
may not be a problem in a school setting where this happens at a predictable
time. Using the Ray-o-vac 8-cell recharger would only require 15(!) outlets for
120 cells.
Personally, I'd prefer a battery pack with removable AA or AAA cells. Cheaper
for me to replace the cells when they wear out, and it can adapt to new battery
technology as it arrives. How about the Electric 9V Battery Box 4 x 14 x 4
(http://guide.lugnet.com/partsref/search.cgi?q=2847c01)
Bruce Boyes wrote:
> As part of our ongoing development of jcx, we are trying to settle on some
> options for rechargeable batteries. At Toys R Us there are standard 9.6V
> NiCd battery packs such as Nikko #1299 with a standard size and connector.
> The size is about 100 x 55 x 15 mm, which is OK. There's no mAh rating, but
> my guess is 700 mAh (this is typical for inexpensive NiCd, NiMH can be 1550
> or better while good Alkalines are 2500). We are also looking at hand tool
> battery packs (the 12V Milwaukee has a nice compact slide-on mount rather
> than the common lumpy 'keyed post' of Porter Cable and DeWalt).
>
> We could also use AA NiMH in a holder and you just put them into a charger
> by hand when it's time.
>
> We're thinking of college labs where they will have 12 or 20 JCX systems
> and where feeding them alkalines is just not practical or cost effective.
> Charging 120 AA cells gets awkward too, so some sort of self-contained
> rechargeable pack seems a good idea.
>
> Any of you out there using rechargeable packs? Any ideas or advice in this
> area?
>
> Thanks
>
> Bruce Boyes
> native 32-bit Java execution Lego controller
> http://jcx.systronix.com
> ------- WWW.SYSTRONIX.COM ----------
> Real embedded Java and much more
> High speed 8051 systems
> +1-801-534-1017 Salt Lake City, USA
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