#11436 NORM 1.75-ha: XO-1.75 runin battery discharge characterisation

Zarro Boogs per Child bugtracker at laptop.org
Fri Nov 11 04:18:50 EST 2011

#11436: XO-1.75 runin battery discharge characterisation
           Reporter:  Quozl                  |       Owner:  rsmith       
               Type:  task                   |      Status:  new          
           Priority:  normal                 |   Milestone:  1.75-hardware
          Component:  manufacturing process  |     Version:  1.75-C1      
         Resolution:                         |    Keywords:               
        Next_action:  design                 |    Verified:  0            
Deployment_affected:                         |   Blockedby:               
           Blocking:                         |  

Comment(by Quozl):

 For XO-1.75, runin-battery 0.15.0 through 0.16.0 has a 15% maximum
 discharge limit, and 20% minimum charge limit.

 According to Chia-Hsiu, on os10 (0.15.0), discharge for one hour decreases
 state of charge by 19%.  On previous builds, the decrease was 24%.

 Charge cycle for one hour increases state of charge from 81% to 96%, which
 is less than the 20% charge threshold, and so the test fails.

 The change in behaviour is due to suspend and resume introduced in os10's

Ticket URL: <http://dev.laptop.org/ticket/11436#comment:1>
One Laptop Per Child <http://laptop.org/>
OLPC bug tracking system

More information about the Bugs mailing list