diff --git a/bumblebee/modules/battery.py b/bumblebee/modules/battery.py
index 10a2600..2a570df 100644
--- a/bumblebee/modules/battery.py
+++ b/bumblebee/modules/battery.py
@@ -1,5 +1,6 @@
 import datetime
 import bumblebee.module
+import os.path
 
 def description():
     return "Displays battery status, percentage and whether it's charging or discharging."
@@ -11,11 +12,17 @@ class Module(bumblebee.module.Module):
     def __init__(self, output, config, alias):
         super(Module, self).__init__(output, config, alias)
         self._battery = config.parameter("device", "BAT0")
-        self._capacity = 0
+        self._capacity = 100
         self._status = "Unknown"
 
     def widgets(self):
-        with open("/sys/class/power_supply/{}/capacity".format(self._battery)) as f:
+        self._AC = False;
+        self._path = "/sys/class/power_supply/{}".format(self._battery)
+        if not os.path.exists(self._path):
+            self._AC = True;
+            return bumblebee.output.Widget(self,"AC")
+
+        with open(self._path + "/capacity") as f:
             self._capacity = int(f.read())
         self._capacity = self._capacity if self._capacity < 100 else 100
 
@@ -28,7 +35,10 @@ class Module(bumblebee.module.Module):
         return self._capacity < self._config.parameter("critical", 10)
 
     def state(self, widget):
-        with open("/sys/class/power_supply/{}/status".format(self._battery)) as f:
+        if self._AC:
+            return "AC"
+
+        with open(self._path + "/status") as f:
             self._status = f.read().strip()
 
         if self._status == "Discharging":