polybar: define the module "battery" and use it (only for buzz)

dot_config/polybar/config.ini.tmpl

@@ -65,7 +65,7 @@ modules-right = pueue filesystem temp cpu memory eth-down eth-up ipv6 caffeine c
 {{- else if eq .chezmoi.hostname "buzz" }}
 modules-left = i3 xwindow
 modules-center = date
-modules-right = filesystem temp cpu memory tray
+modules-right = filesystem temp cpu memory battery tray
 {{- end }}
 
 
@@ -81,6 +81,36 @@ type = internal/tray
 tray-padding = 4
 tray-size = 75%
 
+{{ if eq .chezmoi.hostname "buzz" }}
+[module/battery]
+type = internal/battery
+
+; This is useful in case the battery never reports 100% charge
+; Default: 100
+full-at = 98
+
+; format-low once this charge percentage is reached
+; Default: 10
+; New in version 3.6.0
+low-at = 15
+
+; Use the following command to list batteries and adapters:
+; $ ls -1 /sys/class/power_supply/
+battery = BAT0
+adapter = AC
+
+; If an inotify event haven't been reported in this many
+; seconds, manually poll for new values.
+;
+; Needed as a fallback for systems that don't report events
+; on sysfs/procfs.
+;
+; Disable polling by setting the interval to 0.
+;
+; Default: 5
+poll-interval = 5
+{{ end }}
+
 [module/pueue]
 type = custom/script
 interval = 5