Sample Code
Default
<battery-status-icon></battery-status-icon>
Manually set to 33% and charging
<battery-status-icon level="33" charging></battery-status-icon>
Manually set to 15% with label
<battery-status-icon level="15" show-label></battery-status-icon>
Manually set to 66%
<battery-status-icon level="66"></battery-status-icon>
Autodetect using Navigator.getBattery() API with label
<battery-status-icon autodetect show-label></battery-status-icon>