diff --git a/auto_cpufreq/battery_scripts/ideapad_acpi.py b/auto_cpufreq/battery_scripts/ideapad_acpi.py
index 966132c..cb4334b 100644
--- a/auto_cpufreq/battery_scripts/ideapad_acpi.py
+++ b/auto_cpufreq/battery_scripts/ideapad_acpi.py
@@ -1,12 +1,13 @@
 #!/usr/bin/env python3
-import os, subprocess
+import os
+from subprocess import check_output
 
 from auto_cpufreq.config.config import config
 from auto_cpufreq.globals import POWER_SUPPLY_DIR
 
 def set_battery(value, mode, bat):
     path = f"{POWER_SUPPLY_DIR}{bat}/charge_{mode}_threshold"
-    if os.path.isfile(path): subprocess.check_output(f"echo {value} | tee {path}", shell=True, text=True)
+    if os.path.isfile(path): check_output(f"echo {value} | tee {path}", shell=True, text=True)
     else: print(f"WARNING: {path} does NOT exist")
 
 def get_threshold_value(mode):
@@ -32,6 +33,6 @@ def ideapad_acpi_print_thresholds():
     print(f"battery count = {len(batteries)}")
     for bat in batteries:
         try:
-            print(f'{bat} start threshold = {subprocess.getoutput(f"cat {POWER_SUPPLY_DIR}{bat}/charge_start_threshold")}')
-            print(f'{bat} start threshold = {subprocess.getoutput(f"cat {POWER_SUPPLY_DIR}{bat}/charge_stop_threshold")}')
+            print(bat, "start threshold =", check_output(["cat", POWER_SUPPLY_DIR+bat+"/charge_start_threshold"]))
+            print(bat, "stop threshold =", check_output(["cat", POWER_SUPPLY_DIR+bat+"/charge_stop_threshold"]))
         except Exception as e: print(f"ERROR: failed to read battery {bat} thresholds:", repr(e))
diff --git a/auto_cpufreq/battery_scripts/ideapad_laptop.py b/auto_cpufreq/battery_scripts/ideapad_laptop.py
index 0300162..766160a 100644
--- a/auto_cpufreq/battery_scripts/ideapad_laptop.py
+++ b/auto_cpufreq/battery_scripts/ideapad_laptop.py
@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
-import os, subprocess
+import os
+from subprocess import check_output
 
 from auto_cpufreq.config.config import config
 from auto_cpufreq.globals import CONSERVATION_MODE_FILE, POWER_SUPPLY_DIR
@@ -7,7 +8,7 @@ from auto_cpufreq.globals import CONSERVATION_MODE_FILE, POWER_SUPPLY_DIR
 def set_battery(value, mode, bat):
     path = f"{POWER_SUPPLY_DIR}{bat}/charge_{mode}_threshold"
     if os.path.exists(path):
-        subprocess.check_output(f"echo {value} | tee {POWER_SUPPLY_DIR}{bat}/charge_{mode}_threshold", shell=True, text=True)
+        check_output(f"echo {value} | tee {POWER_SUPPLY_DIR}{bat}/charge_{mode}_threshold", shell=True, text=True)
     else: print(f"WARNING: {path} does NOT exist")
 
 def get_threshold_value(mode):
@@ -16,14 +17,14 @@ def get_threshold_value(mode):
 
 def conservation_mode(value):
     try:
-        subprocess.check_output(f"echo {value} | tee {CONSERVATION_MODE_FILE}", shell=True, text=True)
+        check_output(f"echo {value} | tee {CONSERVATION_MODE_FILE}", shell=True, text=True)
         print(f"conservation_mode is {value}")
     except: print("unable to set conservation mode")
     return
 
 def check_conservation_mode():
     try:
-        value = subprocess.check_output(["cat", CONSERVATION_MODE_FILE], text=True)
+        value = check_output(["cat", CONSERVATION_MODE_FILE], text=True)
         if value == "1": return True
         elif value == "0": return False
         else:
@@ -63,6 +64,6 @@ def ideapad_laptop_print_thresholds():
     print(f"battery count = {len(batteries)}")
     for bat in batteries:
         try:
-            print(f'{bat} start threshold = {subprocess.getoutput(f"cat {POWER_SUPPLY_DIR}{bat}/charge_start_threshold")}')
-            print(f'{bat} start threshold = {subprocess.getoutput(f"cat {POWER_SUPPLY_DIR}{bat}/charge_stop_threshold")}')
+            print(bat, "start threshold =", check_output(["cat", POWER_SUPPLY_DIR+bat+"/charge_start_threshold"]))
+            print(bat, "stop threshold =", check_output(["cat", POWER_SUPPLY_DIR+bat+"/charge_stop_threshold"]))
         except Exception as e: print(f"ERROR: failed to read battery {bat} thresholds:", repr(e))
diff --git a/auto_cpufreq/battery_scripts/thinkpad.py b/auto_cpufreq/battery_scripts/thinkpad.py
index 04a10df..1f16415 100644
--- a/auto_cpufreq/battery_scripts/thinkpad.py
+++ b/auto_cpufreq/battery_scripts/thinkpad.py
@@ -1,12 +1,13 @@
 #!/usr/bin/env python3
-import os, subprocess
+import os
+from subprocess import check_output
 
 from auto_cpufreq.config.config import config
 from auto_cpufreq.globals import POWER_SUPPLY_DIR
 
 def set_battery(value, mode, bat):
     path = f"{POWER_SUPPLY_DIR}{bat}/charge_{mode}_threshold"
-    if os.path.isfile(path): subprocess.check_output(f"echo {value} | tee {path}", shell=True, text=True)
+    if os.path.isfile(path): check_output(f"echo {value} | tee {path}", shell=True, text=True)
     else: print(f"WARNING: {path} does NOT exist")
 
 def get_threshold_value(mode):
@@ -33,6 +34,6 @@ def thinkpad_print_thresholds():
     print(f"battery count = {len(batteries)}")
     for bat in batteries:
         try:
-            print(f'{bat} start threshold = {subprocess.getoutput(f"cat {POWER_SUPPLY_DIR}{bat}/charge_start_threshold")}')
-            print(f'{bat} start threshold = {subprocess.getoutput(f"cat {POWER_SUPPLY_DIR}{bat}/charge_stop_threshold")}')
+            print(bat, "start threshold =", check_output(["cat", POWER_SUPPLY_DIR+bat+"/charge_start_threshold"]))
+            print(bat, "stop threshold =", check_output(["cat", POWER_SUPPLY_DIR+bat+"/charge_stop_threshold"]))
         except Exception as e: print(f"ERROR: failed to read battery {bat} thresholds:", repr(e))