Subject:
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Re: Charging batteries
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 20 Oct 1998 04:31:41 GMT
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Viewed:
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2179 times
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L. M. Lloyd <lee@advfilms.com> wrote
> > - do NiCads have a 'memory effect'?
> Yes! Nickle Metal and Lithium Ion bataries do not.
OK, I've done a web search on this, and the consensus seems to be "not on
this planet". The conditions for the original study were on a satellite,
with absolutely regular charge/discharge cycles, no gravity and no
acceleration. The effect was resolved by 4 deep cycles. I think the
article was at: http://www.vencon.com/articles/nicd2.html, but I may be
wrong.
The other consensus is that the easiest way to wreck nicads is to
overcharge them. You must switch to C/40 or so after charging to between
1.4 and 1.6 C, otherwise you will cause non-repairable damage. The
easiest way to do this is IMO a timer switch. Set it for 15 hours and go
home for the day.
Note that nickel metal hydride and lithium ion hydride batteries are also
vulnerable to overcharging, and especially to overheating. So if you
currently kill nicads regularly NimH may just increase the costs... It
would possibly pay to buy one of the more expensive chargers that do this
automatically.
HTH
Moz
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Message has 2 Replies:
 | | Re: Charging batteries
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| moz wrote in message ... (...) This only works if you are discharging your NiCads to close to dead. If you are topping them off every night then a timer based charger isn't a good idea. Your NiCads will be fully charged pretty quickly, and then will (...) (26 years ago, 20-Oct-98, to lugnet.robotics)
| | | Re: Charging batteries
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| (...) Well I will be the first to admit that this is hardly a scientific study but here is my personal experience. For 4 years I have had the same cellular phone and the same notebook computer. The cellular phone is a Motorola with an Intelecharger (...) (26 years ago, 21-Oct-98, to lugnet.robotics)
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Message is in Reply To:
| | Re: Charging batteries
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| (...) No in the AA size there are companies that make Nickel Metal Hidryde as well as nickel cadmium, but the Nickle Metal are much harder to find and much more expensive.(I suppose there is probably a company out there making Lithium Ion AA I just (...) (26 years ago, 13-Oct-98, to lugnet.robotics)
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