Battery tray indicator that takes into account power consumption trends, rather than just instantaneous wattage?

2026-05-19 16:09 UTC

The battery tray indicators I’ve tried on Linux so far only seem to take the instantaneous power consumption into account. Is there one that gives an estimate based on power draw over a longer time window and integrates easily with my desktop environment’s tray?

Replies (4)

@Wfh@lemmy.zip 2026-05-19 17:23

Most of them are just a frontend for upower anyway.

Open ##2696953
@whatiswrongwithyou@lemmy.ml 2026-05-19 19:55

What is your desktop environment?

Open ##2698773
@Sunsofold@lemmings.world 2026-05-19 22:28

I never thought about it much but how hard would it be to add PID to your power info?

Open ##2699771
@MonkderVierte@lemmy.zip 2026-05-20 16:41

I mean, you can take x samples in y time abd average them, but else? About that, maybe script it nad then display the data in Verve plugin? I’ve created one a few years back but currently don’t use the laptop much, so a bug with calculating the remaining time remains. #!/bin/sh # # pretty-print battery-info and time on shell # Author: Daniel Frei # last change: 09.01.2025 battery_path=/sys/class/power_supply/BAT0 timeout1=10 timeout2=5 error() { printf '%s:\t%s\n' "error" "$1" >&2; [ -n "$2" ] && exit "$2"; } # complain to STDERR and exit if given code # while true; do # 🔌🔌 # reading uevent line for line, because f** idiots and whitespaces in int while read line; do IFS='=' set -- $line case "$1" in "POWER_SUPPLY_NAME") bat_name="$2" ;; "POWER_SUPPLY_STATUS") bat_state="$2" ;; "POWER_SUPPLY_TYPE") bat_type="$2" # = Battery ;; "POWER_SUPPLY_CAPACITY_LEVEL") bat_warn="$2" ;; "POWER_SUPPLY_CAPACITY") bat_perc="$2" ;; "POWER_SUPPLY_ENERGY_NOW") bat_chrg=$(($2 / 1000)) ;; "POWER_SUPPLY_ENERGY_FULL") bat_full=$(($2 / 1000)) ;; "POWER_SUPPLY_ENERGY_FULL_DESIGN") bat_chrg_des=$(($2 / 1000)) ;; "POWER_SUPPLY_VOLTAGE_NOW") bat_volt=$(($2 / 1000)) ;; esac done < "$battery_path"/uevent tt_empty=$(((bat_full - bat_now) / bat_volt)) # TODO tt_full=$(((bat_full + bat_now) / bat_volt)) # TODO bat_ttef="${tt_empty:-"$tt_full"}h" # printf 'tt_empty: %s\n' "$tt_empty" [ -n "$bat_state" ] || [ "$bat_type" = "battery" ] || error "Device has no battery" fgcol="$(tput setaf 2)" # green reset="$(tput sgr0)" symbol="🔋" # conditionals if [ "$bat_state" = "Discharging" ]; then fgcol="$(tput setaf 1)" # red symbol="🪫" fi if [ "$bat_warn" != "Normal" ]; then fgcol="$(tput setaf 1)" # red symbol="⚠" envwarn "Battery ${bat_name}: ${bat_warn}" fi # override bat_ttef only every 2nd time # if $flipflop; then string="${fgcol}${bat_perc}%${reset}/${bat_ttef}" # sleep $timeout1 # flipflop=false # else # symbol="🕑" # string=" $(date +%R)" # sleep $timeout2 # flipflop=true # fi _time="$(date +%R)" tput sc # save cursor position tput cup 0 $(($(tput cols)-20)) # set cursor position printf "%s %s / %s 🕑\n" "$string" "$symbol" "$_time" tput rc # reset cursor position # done

Open ##2723325