Improved SAT II for sale ...batteries

[Michel Lachance]

Brian,

Do you mind if I interrupt with my own answer?  After all, it is me who is 
responsible of all this discussion.  :-) I wanted to make a private reply 
and didn't know the original line was coming from the pianotech list.  Sorry 
for all this folks!

The battery pack consists of 4 AA type cells.  I guess you can use any kind 
of rechargeable AA batteries you can buy at the store.  I took the 
industrial brand (the blue ones with "tongues" on each end).  They are 
presumably more efficient than the common models.

Concerning the suitability of mixing old and new batteries, I don't know.  I 
must admit I am not a specialist.  I have two battery packs of different 
"age" on my portable and I have never seen that drain effect.  May be there 
is some, maybe it's minimal.  There is something I am very positive about 
though: the battery life is now definitively longer on my SAT than a brand 
new one.

The idea of a switch did come through my mind but, why bother.  If you want 
a backup power device, I like very much the idea I saw on this list few 
years ago.  It consists of simply pluging a battery pack into the charger 
jack at the back.

Michel Lachance

>Hi John,

>Didn't mean to sound critical in my earlier post.  My apologies if it came
>through that way.  It can be frustrating trying to write with expression.
>:-)  I understood what you meant.  I probably should have prefaced my
>comments so you knew where I was coming from.  Sorry about that.
>
>Just curious, are they using NiCad batteries? or Nickel Metal Hydride?  Do
>you know what sizes of cells?  ('C' cells, perhaps?)
>
>Best wishes,
>
>Brian Trout
>Quarryville, PA
>btrout@desupernet.net
>
>----- Original Message -----
>From: John Ross <piano.tech@ns.sympatico.ca>
>To: <pianotech@ptg.org>
>Sent: Sunday, October 10, 1999 11:34 AM
>Subject: Re: Improved SAT II for sale
>
>
> > Hi Brian,
> > I guess I didn't make myself clear.
> > If one cell in a battery pack is below standard, it draggs the other 
>cells
>down,
> > and they never reach their full potential.
> > If one cell in an "old" pack is shorted, replacing that cell with a new
>one,
> > will get you by, until another of the older cells shorts out.
> > We are only talking about $20 Cdn for the pack, and you are back to the
>full
> > potential, which I always found adequate.
> > Regards,
> > John M. Ross
> >
> > Brian Trout wrote:
> >
> > > I would tend to think that it would be no problem to use batteries in 
>a
> > > parallel fashion, but it would be advisable to start out with fresh
> > > batteries for both legs of the parallel circuit.  I'm not familiar 
>with
>how
> > > the charging system is set up, but it would need to have an 
>appropriate
> > > current capacity.
> > >
> > > Here's another idea for you, if you're interested.  If there's room 
>for
> > > another battery pack, it might be less radical to add the additional
>battery
> > > circuit with a switch to change back and forth between the two.  If
>they're
> > > put in with the design that they'll never be operational at the same
>time,
> > > it wouldn't have any affect on the charging circuit at all.  Switch in
>one
> > > position, it uses and charges one battery pack.  Switch in the other
> > > position, it uses and charges the other battery pack.  Sort of like a
>second
> > > gas tank on your truck.
> > >
> > > There are no doubt dozens of possible variations.
> > >
> > > Just a thought.
> > >
> > > Brian Trout
> > > Quarryville, PA
> > > btrout@desupernet.net
> > >
> > > ----- Original Message -----
> > > From: John Ross <piano.tech@ns.sympatico.ca>
> > > To: <pianotech@ptg.org>
> > > Sent: Sunday, October 10, 1999 10:14 AM
> > > Subject: Re: Improved SAT II for sale
> > >
> > > > Hi Michel,
> > > > From reading the directions on rechargeable batteries, I notice that
>it
> > > says
> > > > never to mix the batteries in use or recharging. So I would 
>recommend
>that
> > > you
> > > > disconnect the older battery from the SAT, otherwise it will be
> > > detrimental to
> > > > the life of the new one.
> > > > I have changed the battery pack in my spare SAT, with one from Radio
>Shack
> > > and
> > > > it is still working fine.
> > > > I would also think, that you would be putting an extra load on the
> > > charging
> > > > circuit.
> > > > So in my opinion it is a bad idea, to parallel the batteries.
> > > > Regards,
> > > > John M. Ross
> > > > Windsor, Nova Scotia, Canada
> >
> >
>

______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com