@Deprecated
	protected void enableBatteryLevelNotifications() {
		Request.newEnableBatteryLevelNotificationsRequest()
				.setRequestHandler(requestHandler)
				.before(device -> requestHandler.setBatteryLevelNotificationCallback())
				.done(device -> log(Log.INFO, "Battery Level notifications enabled"))
				.enqueue();
	}
This method enables notifications on the Battery Level characteristic.

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