Battery Status plugin cannot be built for windows using browserify

cordova create foo
cd foo
cordova platform add windows
cordova plugin add https://github.com/apache/cordova-plugin-battery-status
cordova build --browserify

Error: 'return' outside of function (60:4) (while aliasify was processing C:\Cordova\foo\plugins\cordova-plugin-battery-status\src\windows\BatteryProxy.js) while parsing file: C:\Cordova\foo\plugins\cordova-plugin-battery-status\src\windows\BatteryProxy.js