@Deprecated
	protected void readBatteryLevel() {
		Request.newReadBatteryLevelRequest()
				.setRequestHandler(requestHandler)
				.with(requestHandler.getBatteryLevelCallback())
				.enqueue();
	}
Reads the battery level from the device.

@deprecated Use {@link #readCharacteristic(BluetoothGattCharacteristic)} instead.
ble/src/main/java/no/nordicsemi/android/ble/BleManager.java