Battery level. ･20% or less than 20%: Red. ･21-40%: Magenta. ･41-60%: Yellow. ･61-80%: Blue. ･81-99%: Green. ･100%: turn off. During charging LED flashes a completion state of charge, it will be off and charging is complete. Note: If the application of the same function is mixed, there is a possibility that it does not work correctly.