I don't know that it is directly relevant, but I have a Toshiba Qosimo X505-Q830, and I get (when plugged in and fully charged): [✍] /sys/class/power_supply/BAT1 $ cat uevent POWER_SUPPLY_NAME=BAT1 POWER_SUPPLY_STATUS=Full POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_TECHNOLOGY=Li-ion POWER_SUPPLY_CYCLE_COUNT=0 POWER_SUPPLY_VOLTAGE_MIN_DESIGN=12500000 POWER_SUPPLY_VOLTAGE_NOW=12500000 POWER_SUPPLY_CURRENT_NOW=0 POWER_SUPPLY_CHARGE_FULL_DESIGN=8000000 POWER_SUPPLY_CHARGE_FULL=7245000 POWER_SUPPLY_CHARGE_NOW=7245000 POWER_SUPPLY_MODEL_NAME=NS2P3SZNJ5WR POWER_SUPPLY_MANUFACTURER=SANYO POWER_SUPPLY_SERIAL_NUMBER=134 And in everything.log I get: kernel: [ 6.705931] [Firmware Bug]: battery: (dis)charge rate invalid. kernel: [ 6.705993] ACPI: Battery Slot [BAT1] (battery present) I don't currently pass any ACPI parameters to my boot. Just a point of comparison.