Recharging alkaline batteries

[Microsoft Mail Server]

alkies use a very different charging current rate and method than nicd

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[Raditecnica de Miguel Ricardo]

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<slugger@REMOVE_TO_EMAIL_pobox.com> escreveu na mensagem
news:37ab1262...@enews.newsguy.com...
> I bought a set of 4 rechargeable AA batteries from Dick Smith last week.
>
> They call them "Big +" and are Alkaline rechargables.
>
> Although they say to only use Big Alkaline Charge I figured that my trusty
> Eveready AA charger (model ACC 86) would be fine. This charger says to use
to
> charge Nickel Cadmium only but I figured hey what's the diff?
>
> Anyway, I charged the alkaline batteries for one cycle seemingly ok but
today I
> had one of the batteries split slightly down one end and some acidy stuff
come
> out (took some of the paint off the battery too). This was after about 3
hours
> of charging.
>
> What have I done?
>
> Why couldn't a Nickel Cadmium charger be used to re-charge Alkaline
> rechargeables? The Everycharger outputs 1.2V and the battery says "Rapid
> charging at 1.5V"
>
> Or should it have been ok in which case I'll take the battery back to Dick
Smith
> for an exchange under warranty.
>
> thanks

Hi

To charge alkaline rechargeable batteries, you need a proper charger,
otherwise they .....BANG. How do I know that?

Miguel
>

[Sam Goldwasser]

There little similarity between a NiCd charger and a rechargeable alkaline
charger.

The batteries are probably ruined and you're lucky worse things didn't happen!

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[mi...@swbell.net]

slugger@REMOVE_TO_EMAIL_pobox.com wrote:
>
> I bought a set of 4 rechargeable AA batteries from Dick Smith last week.
>
> They call them "Big +" and are Alkaline rechargables.
>
> Although they say to only use Big Alkaline Charge I figured that my trusty
> Eveready AA charger (model ACC 86) would be fine. This charger says to use to
> charge Nickel Cadmium only but I figured hey what's the diff?
>
> Anyway, I charged the alkaline batteries for one cycle seemingly ok but today I
> had one of the batteries split slightly down one end and some acidy stuff come
> out (took some of the paint off the battery too). This was after about 3 hours
> of charging.
>
> What have I done?
>
> Why couldn't a Nickel Cadmium charger be used to re-charge Alkaline
> rechargeables? The Everycharger outputs 1.2V and the battery says "Rapid
> charging at 1.5V"
>
> Or should it have been ok in which case I'll take the battery back to Dick Smith
> for an exchange under warranty.
>
> thanks

What are the charging parameters for the rechargeable alkalines?
--
Mike Meers
mi...@swbell.net

[Robert Hancock]

The charging parameters for rechargeable alkaline (Renewal, Pure Energy,
etc.) are totally different than for Ni-Cds. There's no way it would work
properly.

--
Robert Hancock Saskatoon, SK, Canada
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Home Page: http://members.home.net/hancockr

<slugger@REMOVE_TO_EMAIL_pobox.com> wrote in message
news:37ab1262...@enews.newsguy.com...

[&retired0]

Here's some stuff that was posted a while back.
I haven't tried it.
Sorry about the long lines, I'm too lazy to fix it.
miker

Oh, ROV will tell you almost everything about the battery,
includingthe name of the IC manufacturer that builds their
charger circuits.They will also tell you (and truly so) that
you can't charge them inseries -- the chemistry causes power
hogging by one cell and willdestroy the other cells in the
series. This is one reason they aren'tdoing a 9 volt xistor
battery right now. They are working on thechemistry,
though.It is also true that they sell the whole damn charger
package inK-mart cheaper than I can build it even using
junkbox parts.I just wrote a column for KITPLANES magazine
about using these littlerascals in aircraft band handheld
radios -- you might thumb throughthe January issue on your
favorite newsstand.
Check out an article in Popular Electronics, Sept. 1994, pg.
64. Theybuilt up a charger on their own, and include
schematics.Basically, Renewals charge on pulsed currents of
200 - 400 mA in amplitude(depending on the cell), and
charging is terminated at an open circuit voltageof around
1.65V. You need the OCV since the cells have considerable
seriesimpedance, as all alkalines do.

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[Al, N2NKB]

I didn't think too much about this since Radio Shack sells
a rechargeable alkaline charger for $10, which includes two
AA batteries.
Al

Microsoft Mail Server wrote in message ...

[Al, N2NKB]

Thanks for the link, Mike. I quickly browsed it and bookmarked it
for further study. The site looked very informative.
Al

Mike "NO UCE" S. wrote in message <7og0uf$q95$1...@news.panix.com>...

>In article <37A895...@swbell.net>, <mi...@swbell.net> wrote:
>>
>>What are the charging parameters for the rechargeable alkalines?
>

>See http://www.bti.ca/charger.htm
>
>

[Mike NO UCE S.]