[olpc-help] Unexpected battery shutdown at 33%

[rihoward at rawbw.com]

Richard,

Thank you for your timely response.  I ran olpc-log-bat last night.  Now that
you confirmed that I followed the correct procedure  I will email the file to
help at laptop.org when I get home this evening.  I have already opened a ticket
with them but have not heard back.  I will reply to that ticket with (the ticket
number in the subject) with updated information.

Would you mind if I posted this to your battery thread on the OLPC official
forum?  Might get you some more useful data points.

Thanks for contributing to the R and D of this great device.

regards,

Robert Howard

Quoting "Richard A. Smith" <richard at laptop.org>:

> Robert Howard wrote:
> 
> > and then the power  light blinks orange once.  I can then unplug the  
> > power supply, put the battery back in, and then plug in the power  
> > supply and proceed to charge and the power light is orange until  
> > charging completes. This is a reproducible problem.
> > Is this a firmware problem that can be fixed with a patch or do I  
> > need to ask for an RMA ?
> 
> Perhaps both.  The shut off at 33% could be just the small fraction of 
> batteries that have some sort of defect.  I have one battery here at 1cc 
> that stops a 23%.
> 
> However, if you plug up external power you should _always_ get a orange 
> or green, or flashing red (error).  If you have a battery in that only 
> sometimes gives you orange then thats perhaps a firmware bug.
> 
> The first step is to use olpc-logbat to record whats happening.  Search 
> the archives for details on using olpc-logbat.
> 
> But the short version is: fire up a terminal and type olpc-logbat and 
> then leave it running while you duplicate the problems. Charge/discharge 
> light/no-light, etc  Then send the .csv files it creates to 
> help at laptop.org with a description of the problem.  That will open a 
> ticket for you with the volunteer support group.  You can cc: me.
> 
> There is a newer firmware available but I've not specifically fixed a 
> bug like what you are describing (sometimes no charging light) so I'll 
> need more info to know if an upgrade will help.
> 
> -- 
> Richard Smith  <richard at laptop.org>
> One Laptop Per Child
> 


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