rtc

My AR-DV10 have problem about real time clock(RTC). It's about 3~4 minutes faster after a month of setting the exact time. Is my AR-DV10 a defective product? It was purchased in April 2023. (SN: AA634xxx)

There appears to be 3 different Series of the Uniden BCD536HP Scanners 3800xxxx, 4800xxxx, 5800xxxx, if any one can comfirm that there is a new 5800xxxx, it would be appreciated!