ACPI_BATT_UNKNOWN
bst->cap != ACPI_BATT_UNKNOWN && bst->volt != ACPI_BATT_UNKNOWN);
if (bst[i].rate != ACPI_BATT_UNKNOWN &&
if (battio.bix.cycles != ACPI_BATT_UNKNOWN)
if (battio.bix.stmax != ACPI_BATT_UNKNOWN)
if (battio.bix.stmin != ACPI_BATT_UNKNOWN)