[Power] replacement RTC batteries for XO-1 and XO-1.5; which are recommended?

[Nicholas]

My bad, good luck. Have fun. 

----- Original message -----
> Larger deployments should talk to OLPC for large quantities of this
> spare part.
> 
> Smaller deployments won't be able to afford the MOQ.
> 
> --
> 
> There is only one recommended battery model number; ML1220, also
> written as ML-1220:
> 
>     https://octopart.com/search?q=ml1220
>     (first two pages of search results)
> 
> Plenty available from multiple vendors, with reasonably low MOQ, just
> make sure you get the right packaging, or be prepared to replace the
> holder as well.
> 
> On an XO-1, to trade-off part cost for labour, get the cheaper battery
> with PCB tabs, solder wires to the tabs, cover in heat shrink, remove
> the holder from the main board, solder the wires to the board, and
> anchor them with an adhesive so that they don't pull off the traces.
> 
> Alternatively, it might be possible to solder to the battery holder
> contacts.
> 
> Use an adhesive to hold the battery down so that it doesn't bounce
> around; because by bouncing around it will break the wires eventually.
> 
> --
> 
> To trade-off longevity of repair for labour, add a series shottky
> diode and a larger format battery (e.g. ANSI 5029LC) that won't be
> recharged by the main board because of the diode.   It will need
> regular replacement.
> 
> On Tue, Mar 29, 2016 at 03:55:47PM -0400, Adam Holt wrote:
> > Does anyone have recommended RTC battery model number(s) handy for
> > XO-1 and XO-1.5?  In context with these very useful RTC
> > (Real-Time-Clock on motherboard) rescue/maintenance tips here:
> > 
> >    [1]http://wiki.laptop.org/go/Fix_Clock/Background
> > 
> > Evidently some schools prefer a clean start, replacing all their RTC
> > batteries now that XO-1 laptops especially are approaching a decade of
> > life.  Depending what RTC prices and Minimum Order Quantities are
> > forthcoming in 2016+ of course -- both for smaller & larger operations
> > -- perhaps Nathan has an idea?
> > 
> > (Less urgent, but recommended RTC battery model numbers for XO-1.75
> > and XO-4 would be wonderful too, if handy?)
> > 
> > Aside: [2]http://wiki.laptop.org/go/Reuse_checklist is an excellent
> > more comprehensive list of refurbishing tactics for those interested!
> > 
> > References:
> > 
> > [1] http://wiki.laptop.org/go/Fix_Clock/Background
> > [2] http://wiki.laptop.org/go/Reuse_checklist
> 
> > _______________________________________________
> > Devel mailing list
> > Devel at lists.laptop.org
> > http://lists.laptop.org/listinfo/devel
> 
> 
> -- 
> James Cameron
> http://quozl.netrek.org/
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