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.