Battery

Battery status uses UPower. The global warning threshold controls the system battery’s internal low-battery notifications and the warning color state used by default battery widgets. Peripheral batteries warn only when they have an explicit per-device threshold.

[battery]
warning_threshold = 20 # 0 disables low-battery warnings

[battery.device."/org/freedesktop/UPower/devices/battery_BAT0"]
warning_threshold = 15

[battery.device."/org/freedesktop/UPower/devices/headset_dev_00_11_22_33_44_55"]
warning_threshold = 10

Per-device tables use the same UPower selectors as the battery widget device setting. The Settings UI writes full UPower object paths for reported non-system devices. Do not add a per-device table for the default system battery; [battery].warning_threshold is its canonical threshold.