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Old 01 September 2013, 01:58   #1
Zippy Zapp
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SupraRam 500 battery replacement - A500

Hi,

My recently purchased A500 came with a SupraRam 500 installed in the trapdoor. The battery is dead as the clock does not save. The battery is a CR2032 but it seems to be soldered onto the board and not replaceable, without modification. I don't think these types where ever rechargeable. Has anyone replaced these batteries before? Is it just a matter of de-soldering or can I some how fit a replacement in there by bending the contacts?

Here is a link to a picture of what I am talking about:

http://www.bigbookofamigahardware.co...t.aspx?id=1080

Thank you!
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Old 01 September 2013, 04:31   #2
jimbob
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Probably it was a rechargeable type but has totally died. You might just be lucky though and it will work again if you leave the amiga on for a long while.

Those contacts will be spot welded to the battery, if it turns out to be dead and you want to replace it you'll need to get a similar replacement. You should check the battery markings to get the correct type as there are various flavours but rechargeable 2032 is called ML2032, like this -

http://www.ebay.co.uk/itm/3210723769...84.m1439.l2649

I've just put one in a zydec trapdoor board in place of a barrel. Not tested yet, but I expect it will be fine.

EDIT: Actually I just looked properly at the picture and it does seem to be a normal CR2032 with a diode in line to prevent recharging. I guess a 2032 would last many years so you could either get one with welded terminals again or fit a coin cell holder so you can replace it without soldering in future.

Last edited by jimbob; 01 September 2013 at 04:36.
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Old 01 September 2013, 04:58   #3
Zippy Zapp
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Thanks for the info. Yeah that is kind of what I figured but wasn't entirely sure. Not sure why they chose to put the CR2032 soldered on there in place of a regular CR2032 holder. Must have been cheaper or something.

Yeah the markings on my battery do say Maxell CR2032.

Thanks!

ZZ
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