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diff --git a/source/bower_components/modernizr/feature-detects/battery-level.js b/source/bower_components/modernizr/feature-detects/battery-level.js
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+
+// Low Battery Level
+// Enable a developer to remove CPU intensive CSS/JS when battery is low
+// developer.mozilla.org/en/DOM/window.navigator.mozBattery
+// By: Paul Sayre
+
+Modernizr.addTest('lowbattery', function () {
+ var minLevel = 0.20,
+ battery = Modernizr.prefixed('battery', navigator);
+ return !!(battery && !battery.charging && battery.level <= minLevel);
+});