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Battery indicator widget for awesome window manager.

Displays status information from /sys/class/power_supply.

Drop the script into your awesome config folder, e.g.:

cd ~/.config/awesome
git clone https://github.com/deficient/battery-widget.git

Optionally, in order to receive status updates, you will also need acpid:

pacman -S acpid
systemctl enable --now acpid

In order to add a battery widget to your wibox, you have to import the module and then instanciate a widget with the desired options like this:

-- Import module:
local battery_widget = require("battery-widget")

-- Instanciate and add widget to the wibox:
s.mywibox:setup {
    ...,
    { -- Right widgets
        ...,
        battery_widget {
            -- pass options here
        },
    },
}

If you pass an adapter name using the adapter = "..." option, a widget for that specific battery adapter will be instanciated. If the adapter option is not specified, the call will return a table containing widgets for each of the battery adapters in /sys/class/power_supply. In that case if there are no batteries an empty table will be returned and no error will occur on machines without batteries.

The behaviour and appearance of the widget can be tweaked using a few options. This is an example using all available options:

battery_widget {
    ac = "AC",
    adapter = "BAT0",
    ac_prefix = "AC: ",
    battery_prefix = "Bat: ",
    percent_colors = {
        { 25, "red"   },
        { 50, "orange"},
        {999, "green" },
    },
    listen = true,
    timeout = 10,
    widget_text = "${AC_BAT}${color_on}${percent}%${color_off}",
    widget_font = "Deja Vu Sans Mono 16",
    tooltip_text = "Battery ${state}${time_est}\nCapacity: ${capacity_percent}%",
    alert_threshold = 5,
    alert_timeout = 0,
    alert_title = "Low battery !",
    alert_text = "${AC_BAT}${time_est}",
    alert_icon = "~/Downloads/low_battery_icon.png",
    warn_full_battery = true,
    full_battery_icon = "~/Downloads/full_battery_icon.png",
}

adapter The name of the directory entry in /sys/class/power_supply corresponding to the requested battery adapter.

ac The name of the directory entry in /sys/class/power_supply corresponding to your AC status.

ac_prefix The prefix to populate ${AC_BAT} when your computer is using ac power. If your font supports unicode characters, you could use "🔌".

battery_prefix The prefix to populate ${AC_BAT} when your computer is using battery power. If your font supports unicode characters, you could use "🔋". Can also be configured as a table like percent_colors to show different prefixes at different battery percentages.

percent_colors (limits for backwards compatibility) The colors that the percentage changes to, as well as the upper-bound limit of when it will change. Ex. {100, "green"} means any percentage lower than 100 is colored green.

listen Tells the widget to listen to updates via acpi_listen. When an event is fired, the widget updates.

timeout The time interval that the widget waits before it updates itself, in seconds.

widget_text, tooltip_text The text which shows up on the toolbar and when you highlight the widget, respectively. Please refer to function battery_widget:update() for other interpolatable variables.

widget_font The font description used for the widget text, for instance "Deja Vu Sans Mono 16". If this is empty or unspecified, the default font will be used.

alert_threshold The percentage used as the maximum value at which an alert will be generated, -1 to disable alerts. Once the alert is dismissed (or expired) it will not show up again until the battery has been charging.

alert_timeout The time after which the alert expire, 0 for no timeout.

alert_title, alert_text, alert_icon The text which shows up on the alert notification, respectively the title, body text and image path.

warn_full_battery, boolean Whether a notification should be displayed when the battery gets fully charged.

full_battery_icon Path to the image, which should be shown as part of the notification when battery gets fully charged (depends on warn_full_battery).

Percentage tables can be used for ac_prefix, battery_prefix, and percent_colors to show different things depending on the battery charge level, e.g.:

battery_widget {
    -- Show different prefixes when charging on AC
    ac_prefix = {
        { 25, "not charged" },
        { 50, "1/4 charged" },
        { 75, "2/4 charged" },
        { 95, "3/4 charged" },
        {100, "fully charged" },
    },

    -- Show a visual indicator of charge level when on battery power
    battery_prefix = {
        { 25, "#--- "},
        { 50, "##-- "},
        { 75, "###- "},
        {100, "#### "},
    }
}

ac_prefix, battery_prefix, and widget_text can be further customized with spans to specify colors or fonts, e.g.:

battery_widget {
    -- Use different colors for ac_prefix and battery_prefix
    ac_prefix = '<span color="red">AC: </span>',
    battery_prefix = '<span color="green">Bat: </span>',

    -- Use a bold font for both prefixes (overrides widget_font)
    widget_text = '<span font="Deja Vu Sans Bold 16">${AC_BAT}</span>${color_on}${percent}%${color_off}'
}

• awesome 4.0.
• acpid (optional)