Panasonic TY-ER3D5ME Operating Instructions Manual page 13

The power of the 3D Eyewear turns off by itself.
► Are there any objects between the eyewear and
television?
The indicator lamp does not light up when
pressing Power button on the 3D Eyewear.
► The battery is too low to operate the 3D Eyewear.
The indicator lamp does not light when switching on the power by
pressing and hold the power button for 1 second; that indicates the
battery is completely fl at. Replace the battery with new one.
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