Introduction
If the camera's internal clock has stopped working or showing time, it may be necessary to replace the clock battery on the inside of the camera.
Tools
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            Press up firmly on the back-cover release on the right side of the camera to release the back panel. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.
2 comments
Will the camera itself stop working if there is no clock battery?
nope. it’s don’t stop working without clock battery