CallToU E-01A Battery Replacement
HOW TO OPEN THE BACK COVER OF THE CALL BUTTON AND REPLACE THE BATTERY?
Slide the back cover according to the direction of the arrow.
Open the button base by turning the screw with a screwdriver.
Replace the 23A 12V battery.
Close the button base, retighten the screws, and close the back cover.
For more Details:
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