DN81R shows the date 01-01-1970

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3 comments

  • Andy

    Dear customer

    This is the battery problem, the battery on your mainboard is useless, you can directly change another available battery.

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  • Daragh Donovan

    I am having a problem where my dvr stops recording and returns to 1970 date. What do you mean about the battery

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  • joseph aquilina

    I have same problem with same model battrey replaced but same battrey CR1220

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