Can I charge my 9.6V 1200mah NICD using a 6-7 cell DC charger?

[Mar1]

My charger manual says that it can charge 6 to 7 cell NICD / NIMH but
I'm planning to charge an 8 cell 1200mah, what could happen if I do
so? Damage the battery or the charger or both or neither?

[Jonathan Hodgson]

On 2 Jul 2004 05:21:47 -0700, Mar1 wrote:

> My charger manual says that it can charge 6 to 7 cell NICD / NIMH but
> I'm planning to charge an 8 cell 1200mah, what could happen if I do
> so? Damage the battery or the charger or both or neither?

Most likely, it will 'false peak' and won't get a full charge.

The problem with 8 cells is that they may peak over 12 V - if the
supply (lead-acid battery or transformer) is only 12 V then current
will fall as the cell voltage starts to get close, the cell voltage
will fall back and the charger will detect a peak, and shut off.

Try it, but keep a close watch on the cells' temperature - if you're
going to damage them, they'll usually get hot in the process.

HTH,
Jonny

[Mar1]

I tried using a 12V 500 mah AC charger and it seems that it was OK I
kept it for around 3 hours.

Jonathan Hodgson <usenet@jphMUNGEDdevelopments.org.uk> wrote in message news:<vy2wa73mywls.1enf60vm8utyi$.dlg@40tude.net>...
> On 2 Jul 2004 05:21:47 -0700, Mar1 wrote:
>
> > My charger manual says that it can charge 6 to 7 cell NICD / NIMH but
> > I'm planning to charge an 8 cell 1200mah, what could happen if I do
> > so? Damage the battery or the charger or both or neither?
>
> Most likely, it will 'false peak' and won't get a full charge.
>
> The problem with 8 cells is that they may peak over 12 V - if the
> supply (lead-acid battery or transformer) is only 12 V then current
> will fall as the cell voltage starts to get close, the cell voltage
> will fall back and the charger will detect a peak, and shut off.
>
> Try it, but keep a close watch on the cells' temperature - if you're
> going to damage them, they'll usually get hot in the process.
>
> HTH,
> Jonny

[dingo]

pay attention to the 12V supply. A fully charged carbatterie give +- 14V.
If its running low , it's possible the charge current drops with the supply
voltage.




"Mar1" <marwan_al_nusif@hotmail.com> wrote in message
news:7c55eec5.0407040018.4579b79a@posting.google.c om...
> I tried using a 12V 500 mah AC charger and it seems that it was OK I
> kept it for around 3 hours.
>
> Jonathan Hodgson <usenet@jphMUNGEDdevelopments.org.uk> wrote in message
news:<vy2wa73mywls.1enf60vm8utyi$.dlg@40tude.net>...
> > On 2 Jul 2004 05:21:47 -0700, Mar1 wrote:
> >
> > > My charger manual says that it can charge 6 to 7 cell NICD / NIMH but
> > > I'm planning to charge an 8 cell 1200mah, what could happen if I do
> > > so? Damage the battery or the charger or both or neither?
> >
> > Most likely, it will 'false peak' and won't get a full charge.
> >
> > The problem with 8 cells is that they may peak over 12 V - if the
> > supply (lead-acid battery or transformer) is only 12 V then current
> > will fall as the cell voltage starts to get close, the cell voltage
> > will fall back and the charger will detect a peak, and shut off.
> >
> > Try it, but keep a close watch on the cells' temperature - if you're
> > going to damage them, they'll usually get hot in the process.
> >
> > HTH,
> > Jonny