> -----Original Message-----
> From: newtontalk-bounce_at_newtontalk.net
> [mailto:newtontalk-bounce_at_newtontalk.net]On Behalf Of Chris Searles
> Sent: Wednesday, February 20, 2002 5:52 PM
> To: newtontalk_at_newtontalk.net
> Subject: Re: [NTLK] Another Battery Miracle!
>
>
>
> >It has an end-of-charge detection. If this state is
> reached teh Led will
> >turn to green.
> >You can leave the batteries in as long as you wish.
>
> And if the green light never appears, i.e. even after 12
> hours, it means
> the batteries were more or less dead to begin with? (Before
> I put them in
> they could hold a 20% charge which I first drained to zero
> and then tried
> to recharge, but to no avail. I have the feeling the person on ebay
> cheated me by somehow getting them to hold a charge once
> and then not be
> rechargeable again afterwards. How he could do this remains
> a mystery,
> but that was the end result.)
>
> Thanks for your help,
>
> Chris Searles
>
I have had a similar thing with a DUO battery pack, you could 'force
charge' it with a bench psu (NOT recommended Unless you are suicidal
or very careful), it would then charge ok in the DUO, however if you
let the charge go below about 10% then one if the cells developed an
internal short and it would refuse to charge. (the bench psu could
supply a high enough current to blow the short away, it could re-grow
once the potential difference across the cell dropped low enough)
This is probably what is happening with your pack, if you re-build it
though you must replace all the cells so that they match, old and new
cells do not work together very well due to the difference in
remaining capacity etc)
Ben.
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