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+What: /sys/class/power_supply/<battery_name>/eppid
+Date: September 2022
+KernelVersion: 6.1
+Contact: Armin Wolf <W_Armin@gmx.de>
+Description:
+ Reports the Dell ePPID (electronic Piece Part Identification)
+ of the ACPI battery.
+
+ See Documentation/wmi/devices/dell-wmi-ddv.rst for details.