Re: A4000 with leaked battery, but this one is unusual!

hi!

"Hawk" <taoHawk2003@xxxxxxxxx> wrote in message
news:11dglrv1g5g6c3a@xxxxxxxxxxxxxxxxxxxxx
> WNG wrote:
> > Hi everybody!
> >
> > I just followed smeggedd's thread with great interest.
> >
> > I have an A4000 with a leaked battery which was replaced for a new one.
> >
> > Unfortunately, the clock runs late. That is, when the computer is turned
on,
> > it runs fine. But if I leave it off for, lets say 8 hours, it losses 4
of
> > those 8 hours.
> >
> > The new battery was not soldered directly in the motherboard. Instead
two
> > wires were soldered to the motherboard's + and - pads, and then the
battery
> > was soldered to those wires.
> >
> > The pins of the chips around the battery have a greenish color, also.
> >
> > If I remove the battery and then turn on the Amiga, I can measure a 5
Volt
> > (recharging) tension at the cables, so it looks like the the wires are
> > properly soldered.
> >
> > Is this beaviour documented somewhere? Does anyone have a hint?
>
> You should never try to solder a wire directly to the case of a cell.
> The amount of heat that is needed to get a good solder joint to the case
> will cause damage to the internal seals and separator in the cell.
>
> To do it properly metal tabs should be spot welded to the cell...and
> wires soldered to these tabs. This greatly limits the amount of heat
> that the cell case is exposed to.
>
> Long story short, cells can be damaged by soldering directly to the cans.
>
>
> (*>

I assume that the cell is the 3.6V battery (sorry for my limited
vocabulary).

The one I bought had 2 tabs attached to it. One in the + pole and the other
in the - pole. I soldered the wires to these tabs.

Actually I also tried another thing:

It was a schematic I think it is available on aminet. Basicly it consists in
a diode and a coin shaped lithium battery (with its corresponding socket).
The diode it there to prevent the 5V recharging tension to damage the
lithium battery.

Unfortunatly, the problem still remains. :-(

Best regards,
Pedro.


.

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