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vlly-sprtlOffline
Post subject: new battery's true capacity not recognized  PostPosted: 12.07.2012, 10:55



Joined: 2012-01-21
Posts: 5
Location: Oakland, California
Status: Offline
After installing a new battery with larger than the original capacity in a laptop, the power management cannot, or does not, detect the new capacity, although it does detect the actual charge correctly. So the current full charge is displayed as more than the capacity. The battery monitor software does a shutdown too soon, or it shows the time available incorrectly.
The 88.8 Wh was apropriate for the original battery.


      Quote:
>upower -d

Device: /org/freedesktop/UPower/devices/line_power_ACAD
native-path: /sys/devices/LNXSYSTM:00/device:00/ACPI0003:00/power_supply/ACAD
power supply: yes
updated: Wed Jul 11 15:36:04 2012 (33662 seconds ago)
has history: no
has statistics: no
line-power
online: yes

Device: /org/freedesktop/UPower/devices/battery_BAT0
native-path: /sys/devices/LNXSYSTM:00/device:00/PNP0C0A:00/power_supply/BAT0
vendor: Hewlett-Packard
model: Primary
power supply: yes
updated: Wed Jul 11 15:36:09 2012 (33657 seconds ago)
has history: yes
has statistics: yes
battery
present: yes
rechargeable: yes
state: fully-charged
energy: 121.242 Wh
energy-empty: 0 Wh
energy-full: 121.242 Wh
energy-full-design: 88.8 Wh
energy-rate: 0 W
voltage: 12.551 V
percentage: 100%
capacity: 100%
technology: lithium-ion

Daemon:
daemon-version: 0.9.17
can-suspend: yes
can-hibernate yes
on-battery: no
on-low-battery: no
lid-is-closed: no
lid-is-present: yes
is-docked: no

>cat /sys/devices/LNXSYSTM:00/device:00/PNP0C0A:00/power_supply/BAT0/uvent

POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_STATUS=Full
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_CYCLE_COUNT=0
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=14800000
POWER_SUPPLY_VOLTAGE_NOW=12545000
POWER_SUPPLY_CHARGE_FULL_DESIGN=6000000
POWER_SUPPLY_CHARGE_FULL=8192000
POWER_SUPPLY_CHARGE_NOW=8192000
POWER_SUPPLY_MODEL_NAME=Primary
POWER_SUPPLY_MANUFACTURER=Hewlett-Packard
POWER_SUPPLY_SERIAL_NUMBER=


Where can I set this CHARGE_FULL_DESIGN, or energy-full-design, to a correct level?
 
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slhOffline
Post subject: RE: new battery  PostPosted: 12.07.2012, 13:31



Joined: 2010-08-25
Posts: 731

Status: Offline
This is something you generally can't set at all, it needs to get reported correctly from the battery innards to the BIOS, which in turn exposes these ratings via ACPI - the bug can be in either of these steps. If you still have windows installed, checking what how it evaluates the battery status is probably the best start, updating the BIOS is usually a good idea as well; if you bought a 3rd party battery, this might be a bug in its controller (which could even have more drastic side effects).
 
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