diff --git a/auto_cpufreq/core.py b/auto_cpufreq/core.py
index 3d1c90e..f82d527 100644
--- a/auto_cpufreq/core.py
+++ b/auto_cpufreq/core.py
@@ -168,10 +168,13 @@ def charging():
 
     computer_type = getoutput("dmidecode --string chassis-type")
     if computer_type in ["Notebook", "Laptop", "Convertible", "Portable"]:
+        # AC adapter states: 0, 1, unknown
+        ac_info = getoutput(f"grep . {power_dir}A*/online").splitlines()
         # Battery statuses: Full, Charging, Discharging, Unknown
         battery_status = getoutput(f"grep . {power_dir}B*/status").splitlines()
-        # if there's one battery charging, ac_state is True
-        ac_state = any(["Full" in ac or "Charging" in ac for ac in battery_status])
+        # if there's one battery charging, or if there's one ac-adapter on-line, ac_state is True
+        ac_state = (any([not "Discharging" in ac for ac in battery_status]) or 
+                    any(["1" in ac.split(":")[-1] for ac in ac_info]))
     else:
         has_battery = psutil.sensors_battery() is not None
         if has_battery: