in www/battery/index.js [83:93]
window.onload = function() {
addListenerToClass('addBattery', addBattery);
addListenerToClass('removeBattery', removeBattery);
addListenerToClass('addLow', addLow);
addListenerToClass('removeLow', removeLow);
addListenerToClass('addCritical', addCritical);
addListenerToClass('removeCritical', removeCritical);
addListenerToClass('backBtn', backHome);
init();
}