Subject:
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Re: Rechargeable Batteries
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Fri, 3 Aug 2001 04:11:03 GMT
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Viewed:
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1313 times
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In article <3B69FD3A.3DA7E73A@crystal-objects.com>,
caggiano@crystal-objects.com wrote:
> Hello,
>
> I'm at the point now where I need to get rechargeable batteries for the
> RCX. The alkaline's are just now making it anymore.
>
> Are Nicads OK or should I go the extra step and get nickel metal
> hydrides (Ni-MH)? How are radio shack's batteries and chargers?
Nicads have a lower cell voltage (1.2 rather than 1.5), so they won't
work very well in the RCX.
Personally I use rechargeable alkaline cells (e.g. Ray-o-vac Renewal
batteries). The downside to rechargeable alkalines are that they don't
have great capacity - you'll find yourself recharging them rather
frequently. On the plus side: they have great shelf life, are cheap,
easy to find, and don't have any memory effect. I just have an extra
set on hand, and make it a habit to swap sets after an evening of
building. That way the RCX always has fresh power.
I haven't tried NiMH cells, but I don't know of any reason why they
wouldn't work. One potential down-side to NiMH is that they have very
short shelf life (they lose their charge quite rapidly even if not in
use). So if you put your RCX aside for a couple of weeks its very
likely that the NiMH cells will have lost their charge during that time.
If you're using the RCX every day, this isn't an issue.
Dave
--
reply to: dbaum at enteract dot com
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Message has 1 Reply:
 | | Re: Rechargeable Batteries
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| (...) I use NiMH and get a voltage between 7.8V freshly charged and 7V at the low end (i.e. slightly higher than NiCd). The lower voltage is not really a problem for me. The motors may be somewhat less powerful, but if you're just playing and not (...) (23 years ago, 4-Aug-01, to lugnet.robotics.rcx)
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Message is in Reply To:
| | Rechargeable Batteries
|
| Hello, I'm at the point now where I need to get rechargeable batteries for the RCX. The alkaline's are just now making it anymore. Are Nicads OK or should I go the extra step and get nickel metal hydrides (Ni-MH)? How are radio shack's batteries and (...) (23 years ago, 3-Aug-01, to lugnet.robotics.rcx)
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