Usually any 3 volt output button cell would work for CMOS(whether it's DVR,calculator or Laptop) . However the usual non-removable soldered battery in CP plus DVR is CR1220. Not sure how the replacement was done but above shown battery model in this 'jugaad' is CR2032. This online era you can find both these model batteries on Amazon or Flipkart.
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Then other issue
please mention the battery number
Any type of cpu mother board CMOS battery
3 volt
C1220
Usually any 3 volt output button cell would work for CMOS(whether it's DVR,calculator or Laptop) . However the usual non-removable soldered battery in CP plus DVR is CR1220. Not sure how the replacement was done but above shown battery model in this 'jugaad' is CR2032. This online era you can find both these model batteries on Amazon or Flipkart.