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From: Paul <nospam@needed.invalid>
Newsgroups: alt.windows7.general
Subject: Re: Toshiba Satellite A85, Location of RTC/CMOS battery
Date: Tue, 23 Aug 2022 19:33:34 -0400
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On 8/23/2022 6:50 PM, Paul wrote:
> On 8/23/2022 1:10 PM, jaugustine@verizon.net wrote:
>> <SNIP>
>>> I don't see it, in the Irisvista takeapart. There's a yellow thing
>>> in Step 15 I don't recognize, and that's about it for candidates. It
>>> must be hiding under the un-removed stuff.
>>>
>>> http://www.irisvista.com/tech/laptops/Toshiba-Satellite-A85/replace-laptop-memory-1.htm
>>>
>>> The battery is (lithium???). 15mAh. Charge time 24 hours. Discharge time 30 days.
>>> No part number quoted, nor location.
>>>
>>> https://www.manualslib.com/manual/798409/Toshiba-Satellite-A85.html?page=63#manual
>>>
>>> The download link is the usual booby-trappings.
>>>
>>> https://data2.manualslib.com/pdf4/80/7985/798409-toshiba/satellite_a85.pdf?64e5...
>>>
>>> Name: satellite_a85.pdf
>>> Size: 5,720,872 bytes (5586 KiB)
>>> SHA256: 4E5B13CE6C15CABDAA88B22D5B8785E2E9A9DD90BCA5A92F72CB602F832758CD
>>>
>>> Another angle I tried, was looking for the battery, and I tend
>>> to find stuff like this. That's what the "15mAh" is getting me.
>>>
>>> https://www.pchub.com/compaq-presario-b1015-battery-cmos-resume-rtc-p34335
>>>
>>> I'm going to guess it's a floppsy thing, with polyolefin shrink wrap
>>> cover and a black wire and a red wire on it. Depends on chemistry,
>>> as to whether it's three little cells, or one LR2032. But since the
>>> documentation refuses to name it, I can't be sure.
>>>
>> Hi Paul,
>>
>>      Thanks for your effort.
>>
>>       As an alternative,  I searched for an image of the mother board,  because
>> years ago,  I found the location (via image) of RTC battery in an HP laptop.
>>
>>       I saw an image of the mother board for this model, but the resolution
>> was not very good, and it was a one side image.
>>
>>                  John
> 
> They claim it's an ML1220 with welded tabs and solder tails.
> 
> https://www.desertcart.co.il/products/32153858-ml1220-li-ion-cmos-battery-for-use-on-motherboard-toshiba-satellite-a80-a85-a100-a100-011-a100-214-a100-216-a100-233-a100-234-a100-250-a100-906-a100-va3
> 
> It's a 12.5 mm diameter coin cell, 2mm thick.
> 
> https://www.maxell.com.tw/images/uploads/2015/05/ML1220_DataSheet_table.pdf
> 
> The desertcart image would mean it would be standing on edge,
> rather than in a socket. But at least that helps explain the
> difficulty in spotting it.
> 
> Most of the pictures are as fuzzy as hell, so it's not
> exactly easy to see details. Even on "mobo for sale" pictures.
> 
>     Paul

And that would make it the half inch diameter yellow thing, near
the fan. That's an ML1220 with the weld tabs bent and solder tails
inserted into motherboard for soldering. Since the ML1220 was
installed on the secondary side of the motherboard, they needed to
reduce the height. And laying it flat does that for them.

http://www.irisvista.com/tech/laptops/Toshiba-Satellite-A85/big/Toshiba-Satellite-A85-15.jpg

Just make sure you get the (+) and (-) right way round :-)

    Paul