my current tmux conf

.tmux.conf

unbind C-b
set-option -g prefix C-a
bind-key C-a send-prefix

set-option -gs default-terminal "xterm-256color"
set-option -gas terminal-overrides "*:Tc"
set-option -gas terminal-overrides "*:RGB"
set-option -gas terminal-overrides '*:Smulx=\E[4::%p1%dm'
set-option -gas terminal-overrides '*:Setulc=\E[58::2::%p1%{65536}%/%d::%p1%{256}%/%{255}%&%d::%p1%{255}%&%d%;m'
set -g window-style 'fg=grey,bg=black'
set -g window-active-style 'fg=terminal,bg=terminal'

set -s escape-time 10
set-option -g repeat-time 200

set -g history-limit 5000

bind C-c run "tmux save-buffer - | xclip -i -sel clip"
bind C-v run "tmux set-buffer $(xclip -o -sel clip); tmux paste-buffer"

set -s exit-empty off

# reload
bind r source-file ~/.tmux.conf

set -g status-style 'bg=color9,fg=color0'
set -g window-status-current-style 'bg=terminal,fg=color9'
set -g status-left ''
set -g status-right "#[fg=color174]|#[fg=default] #(batterycon) %H:%M "

batterycon

#!/bin/bash

# works on my machine, might not work on yours :')
battery=$(cat /sys/class/power_supply/BAT1/capacity)

if [ "$battery" -le 5 ]; then
    printf '#[fg=#ff0000]\uf244#[fg=default]'
elif [ "$battery" -le 25 ]; then
    printf '\uf243'
elif [ "$battery" -le 50 ]; then
    printf '\uf242'
elif [ "$battery" -le 75 ]; then
    printf '\uf241'
elif [ "$battery" -le 100 ]; then
    printf '\uf240'
fi

# leading space for the icon so it does not overlap with what comes next
printf ' '