Typically, if you want to check the batteries in your remote control, you have to remove them and either use a tester (if you have one) or stick your batteries in another device to see if it works.
Now, there’s a much easier way. Using your iPhone, switch on your camera and aim the remote right at the lens of your iPhone. Looking at the iPhone screen, you should see the tiny light that brightens when you press a button.
Your iPhone camera can register that tiny light much better than the naked eye, so if there is any juice left in your remote’s batteries, your controlled should emit a dim light. If you do not see any light at all, it’s safe to say your remote’s batteries are officially dead. Time to replace those batteries!
Watch the video below for a quick demonstration.
Filed Under: M2M (machine to machine)