I’d instinctively expect it to be more of a binary thing: they work, then when the batteries get to a certain level they completely stop working.
Instead you get this in between phase when the batteries start getting low, where you have to get closer to the TV for them to work. Why?
In: 5
Probably 99% of TV remotes out there operate on infrared light: There’s a little infrared LED in the top of the remote, and the TV / Blu-ray player / streaming box has a little infrared receiver.
The remote communicates its commands to the TV by quickly flashing the LED in a pattern, vaguely like morse code.
So, when the batteries get weak, what can happen is that the LED isn’t shining as bright, or the LED driving circuit can’t get enough power to flash the full command code.
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