SAT batteries 9 volt?

[gordon stelter]

Hi. Does someone have instructions for DIY, SATII
battery replacement? Care to share???
    Thump

--- Richard Strang <rstrang@pa.inter.net> wrote:
> Do yourselve a big favor and install NiMH instead of
> NiCads. They do not
> have any of the problems Nicads have, are lighter,
> have almost twice the
> capacity, and can use the same trickle charger. I
> replaced the Nicads that
> were in my SAT2 with NiMH and they work great. I
> bought a plastic battery
> holder that holds 4 batteries, and installed that in
> the tuner.
> 
> Be careful about deep discharging Nicads. All the
> batteries in the pack are
> not identical in nature. If  one battery goes
> completely dead before the
> others, and you keep discharging it, it will be
> repolarized and damaged
> permanently.
> 
> NiMHs are your best bet.
> 
> Richard
> 
> -----Original Message-----
> From: pianotech-bounces@ptg.org
> [mailto:pianotech-bounces@ptg.org]On
> Behalf Of Paul McCloud
> Sent: Monday, January 19, 2004 11:40 AM
> To: 'Pianotech'
> Subject: RE: SAT batteries 9 volt?
> 
> 
> Diane:
> 	I have replaced my SAT I batteries with a 6 volt
> battery pack
> (NiCads) which is an exact replacement for the
> battery pack that
> Inventronics installed many years ago.  Originally,
> there was a sealed
> lead-acid battery, and the nicads were installed by
> them when the
> original battery went bad.  I don't know if they
> changed the charging
> circuit at that time, but I suspect that it was.
> 	Lately, I removed the internal battery pack and now
> use an
> external battery pack which I velcro'd to the back
> of the unit.  I
> change the individual batteries and charge them in a
> separate charger.
> This way, if one battery goes bad, I don't have to
> replace the whole
> battery pack.  Maybe this is overkill, but I got
> tired of replacing the
> battery pack.
> 	Nicad batteries need to be deep cycled.  They
> should be
> discharged as far as possible, and this way they
> will be conditioned to
> hold a long charge.  When we recharge the internal
> batteries of the SAT,
> they may not be discharged much, so they get used to
> having a short use
> before recharging.  Then if we try to use the SAT
> over a longer time,
> the batteries discharge more quickly.  I think you
> know what I mean.
> The low battery indication circuit on the SAT
> doesn't necessarily give
> the deepest cycle.  It only tells us that the
> battery voltage is
> insufficient to power the unit.  When I remove the
> batteries to recharge
> them in my charger, they will still run my AA
> flashlight for a good
> while.  This is after the low battery indicator has
> shown the need to
> charge them, and after the unit has shut down.
> 	The circuits in the SAT can run on 9 volts, or the
> 6 volts that
> the regular batteries supply.  I've seen 9 volt
> batteries installed on
> the back of a SAT so that when your batteries are
> dead, you just put the
> 9 volt in there, and it will get you through the day
> until you can
> charge them again.  Many electronic devices will run
> on a range of
> voltages.  Using 9 volts will work, but it takes
> more room, and more
> batteries, to get there.  And there's not a whole
> lot of room inside the
> SAT.
> 	I hope this helps.
> 	Paul McCloud
> 
> -----Original Message-----
> From: pianotech-bounces@ptg.org
> [mailto:pianotech-bounces@ptg.org] On
> Behalf Of DIANE HOFSTETTER
> Sent: Sunday, January 18, 2004 9:45 PM
> To: pianotech@ptg.org
> Subject: SAT batteries 9 volt?
> 
> Our apprentice, using my Dad's old SAT 1, tried to
> replace the
> batteries.
> We searched the pianotech archives and he followed
> the instructions
> found,
> but still he gets "LoBat" message after charging it
> for four days.
> 
> Now our question is,  when he used 4 AA batteries,
> that only gave him at
> the
> most 4.5 volts, but the charger we used with the SAT
> was a 9 volt
> charger.
> 
> Are there some kind of industrial quality batteries
> that give 2.5volts
> in an
> AA size?
> 
> Thanks for the help!
> 
> 
> 
> Diane Hofstetter
> 
>
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