Older Dahua NVR5208-8p CMOS battery change?

slowhand23

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Hey guys,

5.5 yr old NVR running fine until recently username/password resets and camera channels got changed around. Both occurrences happened during NVR resets, first one was weekly maintenance and second was user initiated. Thinking maybe battery low and not keeping system info? This was my first NVR, so not sure on typical life span. Anyone change the battery? Appears it may be attached directly to the board?

Thanks for any help!
 
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