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    SubjectSpitz battery questions

    I did some measurements of spitz battery subsystem; maybe they are
    useful for someone.

    Unfortunately, concistent numbers are quite hard: longer/thinner
    cables mean lower voltage and also lower currents :-(. I get quite
    consistents 5V at power supply, but it goes down to 4.5..4.2V when it
    reaches zaurus behind ampermeter. (Is zaurus even able to charge
    battery properly from such low voltage?)

    One big surprise was wlan CF card, eating +200mA when initialized.

    I'm working on drivers/power/spitz_battery driver, and I'll need to
    know conversion between ADC readings and milivolts; does someone have

    Does someone have better/more reliable/other power consumption numbers?


    Idle, charging, no backlight, linux 2.6.26: 200mA @ 4.8V
    bl 1: 310mA
    bl 10: 315mA
    bl 20 340mA
    bl 30: 390mA
    bl 40: 440mA
    bl 47: 445mA
    disk is spinning: +50mA
    find /: +200mA
    cat /dev/zero: +100mA
    make: +240mA

    charging, powerdown: 380mA..440mA
    charging, ROM menu: 550mA
    D+M monitor, not charging: 170mA
    D+M monitor, half charging: 280mA
    D+M monitor, full charging: 480mA..550mA

    Charging in ROM, 23:17: 260mA
    23:21: 245mA
    23:25: 230mA
    23:34: 205mA
    0:08: 100mA
    0:29: 80mA, charger LED is off

    Charging in ROM, from empty @ 8:35: 610mA
    8:38: 555mA
    8:45: 545mA
    8:50: 540mA
    9:01: 540mA
    9:18: 530mA
    9:36: 520mA
    9:45: 505mA
    9:51: 480mA
    10:15: 365mA
    10:48: 250mA
    11:01: 225mA
    11:31: 180mA
    11:38: 170mA
    12:48: 80mA, charger LED is off.

    Measured @ li-ion battery.
    ROM <7mA
    Linux 2.6.26 suspend: 7.5mA, 10mA?!
    Linux 2.6.26, fully running, charger connected: 50uA :-(
    100mA charge

    (cesky, pictures)

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