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#!/bin/sh
for battery in /sys/class/power_supply/BAT?
do
# Get its remaining capacity and charge status.
capacity=$(cat "$battery"/capacity) || break
status=$(sed "s/[Dd]ischarging/🔋/;s/[Nn]ot charging/🛑/;s/[Cc]harging/🔌/;s/[Uu]nknown/♻️/;s/[Ff]ull/⚡/" "$battery"/status)
# If it is discharging and 25% or less, we will add a ❗ as a warning.
[ "$capacity" -le 25 ] && [ "$status" = "🔋" ] && warn="❗"
printf "%s%s%s%% " "$status" "$warn" "$capacity"
unset warn
done | sed 's/ *$//'
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