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I haven’t ever used extra wire with Radio Shack type battery holders. They just need a couple of small modifications. The goal is to get the battery holder to sit flat on top of the two chips on either side. The metal contact pins on the holder are a bit too close together but they are also a bit long, so just bend them out until they reach the solder pads. There are also three little plastic “leg” pins on the bottom of the holder. You need to cut one of them off to get the holder to sit flat.
Once you have it so it looks like it will sit flat, fill each solder pad with solder, then coat the metal pins on the holder with solder, set it in place and reheat both solder pads. Done.
Don B.
From: korgpolyex@yahoogroups.com [mailto:korgpolyex@yahoogroups.com ] On Behalf Of AARON
Sent: Thursday, November 15, 2012 10:40 PM
To: korgpolyex@yahoogroups.com
Subject: [korgpolyex] Re: memory backup battery mod
Yep. They work, they're cheap, and they're easy to find when it comes time to replace them. Besides, I'll probably be selling this machine anyway, so it isn't necessary for me to ensure that the battery lasts forever.
Aaron
--- In korgpolyex@yahoogroups.com, "backshall1" <backshall1@...> wrote:
>I would stick with a CR2032 in a coin cell socket.
>
> Don B.
_____
>
> From: korgpolyex@yahoogroups.com [mailto:korgpolyex@yahoogroups.com] On
> Behalf Of Gordon JC Pearce
> Sent: Thursday, November 15, 2012 5:06 PM
> To: korgpolyex@yahoogroups.com
> Subject: Re: [korgpolyex] Re: memory backup battery mod
>
>
>
>
>
> On 15/11/12 19:00, AARON wrote:
> >
> >
> > But isn't that the type of battery that leaked all over my Poly-61 PCB
> > and made it stop working? :)
>
> They're NiCads, and very different construction.
>
> > Besides, don't you need a charging circuit for that to work? Does the
> > Poly 800 have such a circuit?
>
> That's what the resistor and diode you remove are. It's a crap charging
> circuit, but it pretty much works.
>
> --
> Gordonjcp
>