If you’re not very eager to rush to the nearest supermarket to check if your remote control batteries actually died, this trick will definitely save you time. Just pull out your smartphone, and start the camera app. Then take the remote control, point it at the camera, and press any button. If you see a red or pinkish light coming from the tip of the remote when you look at it through your phone’s display, it means the infrared signal is working properly and the problem, in this case, is the batteries.
