Coin battery replacement kits/sets/parts

[mousehouse]

I'm looking for someone to replace the empty hole in my two Amiga's (3000 and 4000) with a nice LiIon coin battery with holder. I've seen kits advertised on Ebay, but from the pictures it doesn't fit great and leaves the coin cell battery at an angle on the motherboard. I've seen pictures with the holder nice and flat on the board.

Is the kit sold by amigakit one that fits OK and flat on the motherboard of the 3000 and 4000?

Does anybody know of any good kits for sale or have part number that I might be able to find at an electronics shop or online store?

Also, I'm looking for a very good soldering guy or girl in the Netherlands. Doesn;t feel too good to go to just any regular electronics repair shop, I'd like someone who has experience with Amiga's ;-)

[quarkx]

I'm looking for someone to replace the empty hole in my two Amiga's (3000 and 4000) with a nice LiIon coin battery with holder. I've seen kits advertised on Ebay, but from the pictures it doesn't fit great and leaves the coin cell battery at an angle on the motherboard. I've seen pictures with the holder nice and flat on the board.

Is the kit sold by amigakit one that fits OK and flat on the motherboard of the 3000 and 4000?

Does anybody know of any good kits for sale or have part number that I might be able to find at an electronics shop or online store?

Also, I'm looking for a very good soldering guy or girl in the Netherlands. Doesn;t feel too good to go to just any regular electronics repair shop, I'd like someone who has experience with Amiga's ;-)

First, the best kit out there is actually here from member DJ Base. They are esthetically good looking, fit any Amiga motherboard perfectly and flat.
I know, I need to oder a dozen or so more from him
The "kit" sold by Amigakit is not a kit, but just a battery holder (that you can get at any electronics store), you will still have to solder a resister to it. Make sure if you order from them to get the BLACK ones, as I have gotten the white ones in the past from them, and they didn't fit anywhere near anything Amiga. Luckily, with the superb service from Matt and the crew, they replaced the (Very) useless white ones with the normal Black ones without any questions.

[quarkx]

Also, be aware of the Ebay guy selling the kit for $10 USD. It may be a fine kit, but it doesn't hold a candle to DJ Base's kits. Here to Canada, it was actually less to order them in from Germany then the US.
Below are the pictures from my A2000, A3000, and A4000. you can see how good it looks.
BTW, the batteries are the easiest project to tackle if you have no soldering experience, I am just learning to solder and they were a good test. there are step-by-step picures on my blog on how to replace batteries for the A2000,A3000,A4000 and even an A510

[Tahoe]

I can do the soldering for you. Contact me through PM if you want to make an appointment.

[trip6]

Where does DJ base sell his kits?

[mousehouse]

Thanks for all the great replies and even greater pictures. The solution from DJ looks nice, why is the resistor needed anyway? Is it to bypass the charging current when the machine is "on"? The solutions from Amigakit and the guy from Hungary on Ebay don't look that nice and flat on the board.

I'll check with Tahoe if he can solder them on for me, the only question that remains then is where I can find DJ to order some of those nice battery kits.

Earth calling DJ ;-)

[quarkx]

Where does DJ base sell his kits?

I just PM'ed him here on the board, and he sent me a paypal invoice etc. I think he has an "offical" website, but IIRC it's all in German. He has other great stuff too. I got an A1000 "kick Start" board, so I can put in a A2000 Rom and not worry about Kickstart disks. I still haven't put that together though- too many projects, so little time.

There are a ton of other threads on this, just do a search, DJ base usually responded in each one

[Zac67]

DO NOT use a resistor for coin battery solutions. Sorry for yelling, but that could cause the battery to EXPLODE.

What you need is a diode instead, for performance reasons a Germanium one. It'll allow the battery to power the clock while disallowing the mainboard circuit to charge it. Coin batteries are not usually rechargeable and might (will) explode when charged.
The diode needs to be oriented correctly as well. Point the stripe away from (+) or towards (-).

Don't want to spoil any business here, but you can get the required parts in any electronics shop for <2 €.

[mousehouse]

Well, if I look at this picture it indeed looks like a diode (glas thingie), http://www.amigaworld.de/hardware/lithium-batterie-modul/

Sent him an email and now waiting for his reply, it does look like a very neat solution...

[Damion]

Don't want to spoil any business here, but you can get the required parts in any electronics shop for <2 €.

The diode can replace R803 on the A2000, then solder the socket directly to the board. (You can do this on other models as well, just can't recall the locations off the top of my head - though it's easily figured out by looking at the motherboard.)

And Zac67 is right, make sure to use a germanium diode, there will be less voltage drop than with silicon diodes.

Not to detract from DJBase's nice solution.

[trekiej]

Will these work on PC boards that have the barrel battery removed?
Is there another solution for PC motherboards?
Thanks.

[VingtTrois]

Hello,

To change the battery on my Amiga 2000/3000, I saw a diode to prevent the AMIGA not charge non-rechargeable battery.
But what kind of diode do I take?
I found in two models:
-1N4004 and 1N4148.

Can I use one of these diodes?

Thank you for your help.

LTAC

 

[Cosmos Amiga]

1N4148 of course !

[Zac67]

Any will do - voltage and current are so low that you won't be able to find an undersized diode.

A Germanium type (lower voltage drop) will have the advantage of allowing the battery to power the RTC for a longer time before replacement is necessary.

[VingtTrois]

1N4148 of course !

Merci M'sieur!

Any will do - voltage and current are so low that you won't be able to find an undersized diode.

A Germanium type (lower voltage drop) will have the advantage of allowing the battery to power the RTC for a longer time before replacement is necessary.

Thank you.
Diode are so small that I had trouble finding their names!