Opened 7 years ago

Closed 7 years ago

#2126 closed defect (fixed)

B4 NIMH Battery problem

Reported by: RafaelOrtiz Owned by: rsmith
Priority: high Milestone: Trial-2
Component: embedded controller Version:
Keywords: Cc:
Blocked By: Blocking:
Deployments affected: Action Needed:
Verified: no

Description

As see in http://wiki.laptop.org/go/Image:Baseline_battery_test.pdf B4 (Build 496) NIMH batteries
Have duration problems some last less than an hour.


Change History (3)

comment:1 Changed 7 years ago by jg

  • Milestone changed from Untriaged to Trial-2
  • Priority changed from normal to high

Richard,

Is this just needing to condition the batteries?

If so, we need to document said procedure in the wiki and ensure this information is captured for deployment teams.

comment:2 Changed 7 years ago by kimquirk

In our battery tests with 20+ units, the Ni batteries show the biggest inconsistencies in charging. It takes 2-3 deep discharges before you can get >3 hrs life... even so we have seen some Ni batteries that fail in < 1hr, but the next charge it may last longer.

These tests were done with build 502 and higher.

comment:3 Changed 7 years ago by rsmith

  • Resolution set to fixed
  • Status changed from new to closed

Firmware <= Q2C18 had a major charging issue for NiMH. So they were never getting fully charged.

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