diff --git a/x230/release.sh b/x230/release.sh
index 37957ec..cfe6ea9 100755
--- a/x230/release.sh
+++ b/x230/release.sh
@@ -111,6 +111,7 @@ tar -cJf skulls-x230-"${version}".tar.xz \
 	NEWS \
 	util \
 	LICENSE* \
+	skulls_common.sh \
 	x230_before_first_install.sh \
 	x230_skulls.sh \
 	x230_heads.sh \
diff --git a/x230/skulls_common.sh b/x230/skulls_common.sh
new file mode 100755
index 0000000..af420b4
--- /dev/null
+++ b/x230/skulls_common.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-3.0+
+# Copyright (C) 2018, Martin Kepplinger <martink@posteo.de>
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[0;33m'
+NC='\033[0m'
+
+check_x230_root()
+{
+	command -v dmidecode >/dev/null 2>&1 || { echo -e >&2 "${RED}Please install dmidecode and run as root.${NC}"; exit 1; }
+
+	local LAPTOP=$(dmidecode | grep -i x230 | sort -u)
+	if [ -z "$LAPTOP" ] ; then
+		echo "This is no Thinkpad X230. This script is useless then."
+		exit 0
+	fi
+}
+
+check_battery() {
+	local capacity=$(cat /sys/class/power_supply/BAT*/capacity 2>/dev/null || echo -ne "0")
+	local online=$(cat /sys/class/power_supply/AC/online 2>/dev/null || cat /sys/class/power_supply/ADP*/online 2>/dev/null || echo -ne "0")
+	local failed=0
+
+	if [ "${online}" == "0" ] ; then
+		failed=1
+	fi
+	if [ "${capacity}" -lt 25 ]; then
+		failed=1
+	fi
+	if [ $failed == "1" ]; then
+		echo -e "${YELLOW}WARNING:${NC} To prevent shutdowns, we recommend to only run this script when"
+		echo "         your laptop is plugged in to the power supply AND"
+		echo "         the battery is present and sufficiently charged (over 25%)."
+		while true; do
+			read -r -p "Continue anyways? (please do NOT!) y/N: " yn
+			case $yn in
+				[Yy]* ) break;;
+				[Nn]* ) exit;;
+				* ) exit;;
+			esac
+		done
+	fi
+}
+
diff --git a/x230/x230_before_first_install.sh b/x230/x230_before_first_install.sh
index 66fad4c..86c8659 100755
--- a/x230/x230_before_first_install.sh
+++ b/x230/x230_before_first_install.sh
@@ -5,6 +5,7 @@ RED='\033[0;31m'
 GREEN='\033[0;32m'
 NC='\033[0m'
 
+. skulls_common.sh
 set -e
 
 usage()
@@ -44,13 +45,7 @@ do
 	shift
 done
 
-command -v dmidecode >/dev/null 2>&1 || { echo -e >&2 "${RED}Please install dmidecode and run as root.${NC}"; exit 1; }
-
-LAPTOP=$(dmidecode | grep -i x230 | sort -u)
-if [ -z "$LAPTOP" ] ; then
-	echo "This is no Thinkpad X230. This script is useless then."
-	exit 0
-fi
+check_x230_root
 
 BIOS_VENDOR=$(dmidecode -t bios | grep Vendor | cut -d':' -f2)
 if [[ $BIOS_VENDOR = *"coreboot"* ]] ; then
diff --git a/x230/x230_heads.sh b/x230/x230_heads.sh
index 4c8cf30..64866e4 100755
--- a/x230/x230_heads.sh
+++ b/x230/x230_heads.sh
@@ -7,6 +7,9 @@ YELLOW='\033[0;33m'
 NC='\033[0m'
 
 set -e
+
+. skulls_common.sh
+
 have_input_image=0
 
 usage()
@@ -22,32 +25,6 @@ usage()
 	echo "Usage: $0 -i <heads_image>.rom"
 }
 
-check_battery() {
-	local capacity=$(cat /sys/class/power_supply/BAT*/capacity 2>/dev/null || echo -ne "0")
-	local online=$(cat /sys/class/power_supply/AC/online 2>/dev/null || cat /sys/class/power_supply/ADP*/online 2>/dev/null || echo -ne "0")
-	local failed=0
-
-	if [ "${online}" == "0" ] ; then
-		failed=1
-	fi
-	if [ "${capacity}" -lt 25 ]; then
-		failed=1
-	fi
-	if [ $failed == "1" ]; then
-		echo -e "${YELLOW}WARNING:${NC} To prevent shutdowns, we recommend to only run this script when"
-		echo "         your laptop is plugged in to the power supply AND"
-		echo "         the battery is present and sufficiently charged (over 25%)."
-		while true; do
-			read -r -p "Continue anyways? (please do NOT!) y/N: " yn
-			case $yn in
-				[Yy]* ) break;;
-				[Nn]* ) exit;;
-				* ) exit;;
-			esac
-		done
-	fi
-}
-
 args=$(getopt -o i:h -- "$@")
 if [ $? -ne 0 ] ; then
 	usage
@@ -79,6 +56,8 @@ do
 	shift
 done
 
+check_x230_root
+
 if [ ! "$have_input_image" -gt 0 ] ; then
 	image_available=$(ls -1 | grep rom || true)
 	if [ -z "${image_available}" ] ; then
diff --git a/x230/x230_skulls.sh b/x230/x230_skulls.sh
index 2e1fa04..11f3908 100755
--- a/x230/x230_skulls.sh
+++ b/x230/x230_skulls.sh
@@ -7,6 +7,9 @@ YELLOW='\033[0;33m'
 NC='\033[0m'
 
 set -e
+
+. skulls_common.sh
+
 have_input_image=0
 
 usage()
@@ -20,32 +23,6 @@ usage()
 	echo "Usage: $0 -i <4mb_top_image>.rom"
 }
 
-check_battery() {
-	local capacity=$(cat /sys/class/power_supply/BAT*/capacity 2>/dev/null || echo -ne "0")
-	local online=$(cat /sys/class/power_supply/AC/online 2>/dev/null || cat /sys/class/power_supply/ADP*/online 2>/dev/null || echo -ne "0")
-	local failed=0
-
-	if [ "${online}" == "0" ] ; then
-		failed=1
-	fi
-	if [ "${capacity}" -lt 25 ]; then
-		failed=1
-	fi
-	if [ $failed == "1" ]; then
-		echo -e "${YELLOW}WARNING:${NC} To prevent shutdowns, we recommend to only run this script when"
-		echo "         your laptop is plugged in to the power supply AND"
-		echo "         the battery is present and sufficiently charged (over 25%)."
-		while true; do
-			read -r -p "Continue anyways? (please do NOT!) y/N: " yn
-			case $yn in
-				[Yy]* ) break;;
-				[Nn]* ) exit;;
-				* ) exit;;
-			esac
-		done
-	fi
-}
-
 args=$(getopt -o i:h -- "$@")
 if [ $? -ne 0 ] ; then
 	usage
@@ -77,6 +54,8 @@ do
 	shift
 done
 
+check_x230_root
+
 if [ ! "$have_input_image" -gt 0 ] ; then
 	image_available=$(ls -1 | grep x230_coreboot_seabios || true)
 	if [ -z "${image_available}" ] ; then