#11420 NORM 1.75-fi: [CL2]There are problems with battery capacity and power on symptom not correct.

Zarro Boogs per Child bugtracker at laptop.org
Mon Nov 28 10:10:04 EST 2011

#11420: [CL2]There are problems with battery capacity and power on symptom not
           Reporter:  garysu               |       Owner:  rsmith       
               Type:  defect               |      Status:  new          
           Priority:  normal               |   Milestone:  1.75-firmware
          Component:  embedded controller  |     Version:  1.75-C1      
         Resolution:                       |    Keywords:               
        Next_action:  never set            |    Verified:  0            
Deployment_affected:                       |   Blockedby:               
           Blocking:                       |  

Comment(by rsmith):

 Replying to [comment:8 garysu]:
 > add olpc-pwr-log(pwr-111128-015054-353f313d00000088.csv). [[BR]]
 > Update the discharge status. [[BR]]

 Thank you for the log.  I am testing a new firmware with the SOC values
 re-calibrated.  I will release a new firmware to test soon.  That should
 make the the SOC% more accurate. However, that is not the problem here.

 There is a problem with your battery. It has a capacity that is much too
 low and does not meet specification.  Look at the 8th column in the olpc-
 pwr-log file.  That column is the used capacity in uAh.  The last line in
 your logs shows that the discharged capacity of -2387917 uAh or 2387 mAh.
 This is much too low. The rated capacity of our batteries is supposed to
 be 3100 mAh and I typically see values between 2800 and 3200 mAh.
 1-(2387/3100) = .23 or 23% so the EC reporting of 24% is accurate.

 You should return that battery to BYD and have them do FA on it to figure
 out why the capacity is so low.

 Please run this test with other batteries and check it on a battery that
 has the proper capacity.

Ticket URL: <http://dev.laptop.org/ticket/11420#comment:9>
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