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You can also use a camcorder to see infrared remotes. Some digital cameras are sensitive in this invisible light band, too.joescat said:Okay, not related to Chargers at all. . . but, you can use any night vision device to see the beam from an infrared remote control. Useful for testing ones that don't have an indicator light and are suspected of not functioning. And, you can use any infrared beam at all to light up the night, and signal another a long way away.