<field> <id>battery-voltage</id> <title>Battery Level</title> <unit>volt</unit> <min>3</min> <max>4.4</max> <interval>0.2</interval> <decimals>1</decimals> <colour>black</colour> <bands> <band threshold="3.7"> <colour>green</colour> <text>good</text> </band> <band threshold="3.5"> <colour>orange</colour> <text>low</text> </band> <band threshold="0"> <colour>red</colour> <text>dead</text> </band> </bands> </field>