The Kawai & Teisco Analog Synths Group

Forgive my ignorance about batteries, but how much life do you expect to get 
from the 3v lithium battery?  Do they last much longer than other 
rechargeable batteries?  I want to go ahead and replace my nicad battery, 
but want to be sure i choose the right option.

How did place the lithium battery on the board?  Do you solder leads to the 
positive and negative sides, and use them as de facto stand offs, to keep 
the battery off the board?  I've messed around with electronics, but have 
not played inside my keyboard yet.  Any further tips you can provide would 
be greatly appreciated.
Thanks!
Brian


>From: kawai_sx210@yahoogroups.com
>Reply-To: kawai_sx210@yahoogroups.com
>To: kawai_sx210@yahoogroups.com
>Subject: [kawai_sx210] Digest Number 135
>Date: 10 Feb 2006 20:46:25 -0000
>
>There is 1 message in this issue.
>
>Topics in this digest:
>
>       1. Re: Corrected Spelling
>            From: "gil_we" <gil_we@...>
>
>
>________________________________________________________________________
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>Message: 1
>    Date: Fri, 10 Feb 2006 00:30:55 -0000
>    From: "gil_we" <gil_we@...>
>Subject: Re: Corrected Spelling
>
>To replace the battery type with Lithium you should block the
>charger, otherwise the battery would explode (it is not rechargable).
>
>To do that, replace the battery with a coin cell 3v lithium one,
>while placing a a 1N4148 diode with the positive side of the diode
>facing the positive side of the battery, connected to the 1,5K
>resistor on its other side.
>
>I've done that on a few instruments including my SX210 and so far it
>works fine.
>
>
>
>--- In kawai_sx210@yahoogroups.com, "faisanvideo" <faisan@...> wrote:
> >
> > In defence of the notorious Ni-Cd 3.6v 50mah (see Photos) I would
>like
> > to say that I purchased my SX-210 back in 1982 and I have only
> > recently replaced the Memory Battery due to leakage; that's 23 years
> > not bad going in my estimation. But it has to be acknowledged it can
> > cause damage to the circuit board if left unchecked; I was
>fortunate I
> > only had superficial damage easily put right with a little help from
> > group member's advice.
> > Unfortunately I too was unsuccessful in finding the details in the
>old
> > group records on how to convert to Lithium with a blocking Diode (to
> > prevent charging?)(Why prevent charging?) Or did I miss read it! in
> > the end I settled (with great success)on a replacement Nick Metal
> > Hydride Memory Backup Battery 3.6v 80mah available from
> > http://www.rapidelectronics.co.uk/ Order Code: - 18-1625 .\ufffd2.05p
>plus
> > P&P & VAT.  This site also has a range of jack plugs and sockets etc
> > including right angled plugs which I found particularly useful; they
> > have no minimum charge only postage.
> > Another site in America has the Ni-Cd 3.6v 60mah @ $5.95 but
> > operates a minimum order charge of $50, Plus Carriage.
> > http://partsexpress.com/ Part No: -141-102. Hope you find this
> > information useful; Regards, Clive. 08.02.06.
> >
>
>
>
>
>
>
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