Battery drain rate for Linpus and other distros

Discussion in 'Linux' started by benoit, Nov 3, 2008.

  1. benoit

    benoit

    Joined:
    Nov 3, 2008
    Messages:
    1
    Likes Received:
    0
    I would like to know battery drain rate for Ubuntu, Mandriva, Larchlinux, etc. Linpus uses between 10 and 11 watts (depending wifi and brightness).

    To see how many watts your AA1 uses, do the folowing:

    1. Unplug the main (so the battery drains)
    2. Wait 15 seconds
    3. start a terminal session and type cat /proc/acpi/battery/BAT1/state
    4. multiply the 'present voltage' with 'present rate' (scale to amperes and volts first by dividing by 1000)
    5. If you want to know how much battery you have left, divide remaining capacity by present rate (result in hours). Ex from below (2162 mAH / 864 mA) = 2,5 hours

    For Linpus: Normal Brightness, wifi enabled, I have 12.215Volt x 0.864 Ampere =10.55 Watts (see below)
    [[email protected] ~]$ cat /proc/acpi/battery/BAT1/state
    present: yes
    capacity state: ok
    charging state: discharging
    present rate: 864 mA
    remaining capacity: 2162 mAh
    present voltage: 12215 mV


    For Linpus: Minimal Brightness, wifi disabled, I have 12.236Volt x 0.813 Ampere = 9.948Watt (see below)
    [[email protected] ~]$ cat /proc/acpi/battery/BAT1/state
    present: yes
    capacity state: ok
    charging state: discharging
    present rate: 813 mA
    remaining capacity: 2174 mAh
    present voltage: 12236 mV
     
    benoit, Nov 3, 2008
    #1
    1. Advertisements

  2. benoit

    Foranamo

    Joined:
    Aug 13, 2008
    Messages:
    27
    Likes Received:
    0
    That's under heavy usage, right? With minimal brightness and wifi disabled my One uses ~7 Watts :eek:
     
    Foranamo, Nov 13, 2008
    #2
    1. Advertisements

  3. benoit

    zaphod

    Joined:
    Jul 10, 2008
    Messages:
    156
    Likes Received:
    0
    Location:
    France
    Linpus, minimal brightness, WiFi on: 7.9W

    present rate: 697 mA
    remaining capacity: 1276 mAh
    present voltage: 11320 mV

    EDIT: Having repeated this test a few times I would question its validity as the current reported varies quite considerably for no apparently good reason.
     
    zaphod, Nov 13, 2008
    #3
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.