Subject:
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Re: what batteries
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 21 Dec 2005 19:06:17 GMT
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Original-From:
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Peter Loron <peterl@standingwave+spamcake+.org>
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Viewed:
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1517 times
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I've had very good luck using NiMH AA batteries in my RCX. I never ran a
set of alkalines out in mine, so I cannot compare run times.
However, a set of alkalines would need to last hundreds of times longer
than a set of NiMH cells to be cheaper (not to mention better for the
environemnt).
I would absolutely recommend investing in NiMH cells and chargers. Based
on the cost of NiMHs+chargers and top brand (Duracell, etc) alkalines
here in the US, you start saving money after the 3rd or 4th cycle...and
NiMHs can typically be recharged hundreds of times.
-Pete
Robert C Peterson wrote:
> We are starting a mindstorm club at the missionary school here in Bogotá and
> have 4 sets, but we want to try to keep costs down so for the long term we were
> considering rechargeable batteries, but they have a significant voltage
> disadvantage. How long do good alkalines last? Is it worth the trouble to invest
> in NiMH batteries? What are some other options?
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Message has 1 Reply:
 | | Re: what batteries
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| (...) I mostly agree with your comparison. But NiMH has one major drawback: they power the RCX under 7.2V instead of 9V. The motors turn slower and deliver about half mechanical power, see this chart: (URL) Of course this is probably not a problem (...) (19 years ago, 21-Dec-05, to lugnet.robotics, FTX)
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Message is in Reply To:
| | what batteries
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| We are starting a mindstorm club at the missionary school here in Bogotá and have 4 sets, but we want to try to keep costs down so for the long term we were considering rechargeable batteries, but they have a significant voltage disadvantage. How (...) (19 years ago, 20-Dec-05, to lugnet.robotics)
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