diff --git a/battery.tmux b/battery.tmux
index 0c666b8..5457e92 100755
--- a/battery.tmux
+++ b/battery.tmux
@@ -17,6 +17,7 @@ battery_interpolation=(
 	"\#{battery_icon_status}"
 	"\#{battery_percentage}"
 	"\#{battery_remain}"
+    "\#{battery_should_charge}"
 )
 
 battery_commands=(
@@ -32,6 +33,7 @@ battery_commands=(
 	"#($CURRENT_DIR/scripts/battery_icon_status.sh)"
 	"#($CURRENT_DIR/scripts/battery_percentage.sh)"
 	"#($CURRENT_DIR/scripts/battery_remain.sh)"
+    "#($CURRENT_DIR/scripts/battery_chargetime.sh)"
 )
 
 set_tmux_option() {
diff --git a/scripts/battery_chargetime.sh b/scripts/battery_chargetime.sh
new file mode 100755
index 0000000..4ee12ed
--- /dev/null
+++ b/scripts/battery_chargetime.sh
@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+
+CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+source "$CURRENT_DIR/helpers.sh"
+
+get_percent() {
+	# percentage displayed in the 2nd field of the 2nd row
+	if command_exists "pmset"; then
+		pmset -g batt | grep -o "[0-9]\{1,3\}%"
+	elif command_exists "acpi"; then
+		acpi -b | grep -m 1 -Eo "[0-9]+%"
+	elif command_exists "upower"; then
+        # use DisplayDevice if available otherwise battery
+		local battery=$(upower -e | grep -E 'battery|DisplayDevice'| tail -n1)
+		if [ -z "$battery" ]; then
+			return
+		fi
+		local percentage=$(upower -i $battery | awk '/percentage:/ {print $2}')
+		if [ "$percentage" ]; then
+			echo ${percentage%.*%}
+			return
+		fi
+		local energy
+		local energy_full
+		energy=$(upower -i $battery | awk -v nrg="$energy" '/energy:/ {print nrg+$2}')
+		energy_full=$(upower -i $battery | awk -v nrgfull="$energy_full" '/energy-full:/ {print nrgfull+$2}')
+		if [ -n "$energy" ] && [ -n "$energy_full" ]; then
+			echo $energy $energy_full | awk '{printf("%d%%", ($1/$2)*100)}'
+		fi
+	elif command_exists "termux-battery-status"; then
+		termux-battery-status | jq -r '.percentage' | awk '{printf("%d%%", $1)}'
+	elif command_exists "apm"; then
+		apm -l
+	fi
+}
+
+recommend_charging() {
+    local percentage=$(get_percent)
+    percentage=$(echo ${percentage} | sed -e 's/%//g')
+    if [[ $percentage -lt 20 ]]; then
+        if [[ "$(battery_status)" == "discharging" ]]; then
+            echo "CHARGE IMMEDIATELY"
+        fi
+    elif [[ $percentage -gt 80 ]]; then
+        if [[ "$(battery_status)" != "discharging" ]]; then
+            echo "STOP CHARGING"
+        fi
+    fi
+}
+
+main() {
+	recommend_charging
+}
+main