Advanced Configuration and Power Interface Specification

Power Source and Power Meter Devices
Field Format Description
Serial Number
Battery Type
OEM Information
Battery
Swapping
Capability
String
(ASCIIZ)
String
(ASCIIZ)
String
(ASCIIZ)
Integer
(DWORD)
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.
• 0x00000000 Non swappable battery (for example, sealed internal
battery not accessible to user)
• 0x00000001 Cold swappable battery, i.e. batteries that require system
to be shut down in order to replace the battery while on DC power (for
example, phone and laptop batteries accessible to user)
• 0x00000010 Hot swappable battery, i.e. batteries that do not require
the system to be shut down in order to replace/remove the battery
while on DC power (for example, accessory batteries, cd tray
batteries, external batteries, dock batteries, keyboard batteries)
Note: A secondary-type battery should report the corresponding capacity (except for Unknown).
Note: On a multiple-battery system, all batteries in the system should return the same granularity.
Note: Operating systems prefer these control methods to report data in terms of power (watts).
Note: On a multiple-battery system, all batteries in the system must use the same power unit.
Note: 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.
10.2.2.3 _OSC Definition for Control Method Battery
_OSC for control method battery is uniquely identified by the UUID:
F18FC78B-0F15-4978-B793-53F833A1D35B
The Revision 1 capabilities described under this _OSC are defined in Table 10-275.
Table 10-275 Control Method Battery _OSC Capabilities DWORD2 Bit Definitions
Capabilities
DWORD2 bits
Interpretation
0 0 – OS does not support revised battery granularity definition.
1 – OS supports revised battery granularity definition.
1 0 – OS does not support specifying wake on low battery user preference.
1 – OS supports specifying wake on low battery user preference, See Section 9.1.3,
_BLT Battery Level Threshold) for more information.
2-31 Reserved
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