6. How to check the battery of μBTR on cellphone?
A: The way to check the battery of μBTR on the smart phone running the different OS is not the same.
iOS: When it's connected to μBTR, the battery bar on the notification bar is the remaining capacity of μBTR. Or you could go to Widget and add the Battery, then you could see the battery of μBTR.
Android phone: Some cellphones could show remaining battery on the notification bar.