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What: /sys/class/power_supply/<supply_name>/alarm
Date: April 2021
KernelVersion: 5.13
Contact: Maximilian Luz <luzmaximilian@gmail.com>
Description:
Battery trip point. When the remaining battery capacity crosses this
value in either direction, the system will be notified and if
necessary woken.
Set to zero to clear/disable.
Access: Read, Write
Valid values: In micro-Wh or micro-Ah, depending on the power unit
of the battery