This app _tries_ to show battery level of the bluetooth devices. Bluetooth device MUST has Hands-Free profile (accept, reject phone calls) or GATT profile (usually 4.0+ Low Energy devices).
To recheck battery level just tap on the notification.
这个程序_tries_显示蓝牙设备的电池电量。蓝牙设备必须具有免提模式(接受,拒绝电话)或GATT配置文件(通常是4.0 +低功耗设备)。
重新检查电池电量只需轻按上的通知。