@Override
	public void log(@LogPriority final int priority, @NonNull final String message) {
		// Override to log events. Simple log can use Logcat:
		//
		// Log.println(priority, TAG, message);
		//
		// You may also use Timber:
		//
		// Timber.log(priority, message);
		//
		// or nRF Logger:
		//
		// Logger.log(logSession, LogContract.Log.Level.fromPriority(priority), message);
		//
		// Starting from nRF Logger 2.1.3, you may use log-timber and plant nRFLoggerTree.
		// https://github.com/NordicSemiconductor/nRF-Logger-API
	}
Returns the last received value of Battery Level characteristic, or -1 if such
does not exist, hasn't been read or notification wasn't received yet.
<p>
The value returned will be invalid if overridden {@link #readBatteryLevel()} and
{@link #enableBatteryLevelNotifications()} were used.

@return The last battery level value in percent.
@deprecated Keep the battery level in your manager instead.
ble/src/main/java/no/nordicsemi/android/ble/BleManager.java