Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
Field Format Description
Design Capacity
of Low
Battery Capacity
Granularity 1
Battery Capacity
Granularity 2
Model Number
Serial Number
Battery Type
OEM Information
Integer
(DWORD)
Integer
(DWORD)
Integer
(DWORD)
String
(ASCIIZ)
String
(ASCIIZ)
String
(ASCIIZ)
String
(ASCIIZ)
OEM-designed low battery capacity. See Section 3.9.4, “Low Battery
Levels.”
0x000000000 – 0x7FFFFFFF in [mWh] or [mAh]
Battery capacity granularity between low and warning in [mAh] or [mWh].
That is, this is the smallest increment in capacity that the battery is
capable of measuring. See note below for more details
Battery capacity granularity between warning and Full in [mAh] or [mWh].
That is, this is the smallest increment in capacity that the battery is
capable of measuring. This may be a different value than Battery Capacity
Granularity 1 to accommodate systems where the granularity accuracy
may change depending on the battery level. See note below for more
details.
OEM-specific Control Method Battery model number
OEM-specific Control Method Battery serial number
The OEM-specific Control Method Battery type
OEM-specific information for the battery that the UI uses to display the
OEM information about the Battery. If the OEM does not support this
information, this field should contain a NULL string.
Additional Notes:
• A secondary-type battery should report the corresponding capacity (except for Unknown).
• On a multiple-battery system, all batteries in the system should return the same granularity.
• Operating systems prefer these control methods to report data in terms of power (watts).
• On a multiple-battery system, all batteries in the system must use the same power unit.
• The definition of battery capacity granularity has been clarified. For OSPM to determine if
systems support the clarified definition of battery capacity granularity, OSPM may evaluate an
_OSC method at the battery scope to indicate support for this capability, and for the platform to
indicate if it supports these extended capabilities.
10.2.2.2 _BIX (Battery Information Extended)
The _BIX object returns the static portion of the Control Method Battery information. This
information remains constant until the battery is changed. The _BIX object returns all information
available via the _BIF object plus additional battery information. The _BIF object is deprecated in
lieu of _BIX in ACPI 4.0.
Arguments:
None
Return Value:
A Package containing the battery information as described below
572 April, 2015 Version 6.0