The problem is not exclusive to Dell; it affects my Acer Aspire 3690-2672. I've been seeing the exact same behavior as the OP since 2.6.24-rc4 (vanilla from kernel.org, the first 2.6.24 I tried), and currently with a custom kernel built from linux-source-2.6.24 (2.6.24-3 - I haven't yet built -4); the plugin initially reports 100%, and soon drops to 28%, consistently. It also incorrectly reports that the AC is offline.
Output of 'grep . /sys/class/power_supply/BAT1/*' (my system only has BAT1, no BAT0): /sys/class/power_supply/BAT1/alarm:0 /sys/class/power_supply/BAT1/charge_full:1818000 /sys/class/power_supply/BAT1/charge_full_design:2000000 /sys/class/power_supply/BAT1/charge_now:1818000 /sys/class/power_supply/BAT1/current_now:0 /sys/class/power_supply/BAT1/manufacturer:SANYO /sys/class/power_supply/BAT1/model_name:GC86508SAT0 /sys/class/power_supply/BAT1/present:1 /sys/class/power_supply/BAT1/status:Full /sys/class/power_supply/BAT1/technology:Li-ion /sys/class/power_supply/BAT1/type:Battery /sys/class/power_supply/BAT1/uevent:POWER_SUPPLY_NAME=BAT1 /sys/class/power_supply/BAT1/uevent:POWER_SUPPLY_TYPE=Battery /sys/class/power_supply/BAT1/uevent:POWER_SUPPLY_STATUS=Full /sys/class/power_supply/BAT1/uevent:POWER_SUPPLY_PRESENT=1 /sys/class/power_supply/BAT1/uevent:POWER_SUPPLY_TECHNOLOGY=Li-ion /sys/class/power_supply/BAT1/uevent:POWER_SUPPLY_VOLTAGE_MIN_DESIGN=14800000 /sys/class/power_supply/BAT1/uevent:POWER_SUPPLY_VOLTAGE_NOW=16593000 /sys/class/power_supply/BAT1/uevent:POWER_SUPPLY_CURRENT_NOW=0 /sys/class/power_supply/BAT1/uevent:POWER_SUPPLY_CHARGE_FULL_DESIGN=2000000 /sys/class/power_supply/BAT1/uevent:POWER_SUPPLY_CHARGE_FULL=1818000 /sys/class/power_supply/BAT1/uevent:POWER_SUPPLY_CHARGE_NOW=1818000 /sys/class/power_supply/BAT1/uevent:POWER_SUPPLY_MODEL_NAME=GC86508SAT0 /sys/class/power_supply/BAT1/uevent:POWER_SUPPLY_MANUFACTURER=SANYO /sys/class/power_supply/BAT1/voltage_min_design:14800000 /sys/class/power_supply/BAT1/voltage_now:16593000 Celejar -- mailmin.sourceforge.net - remote access via secure (OpenPGP) email ssuds.sourceforge.net - A Simple Sudoku Solver and Generator -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]