Looked at the Carrier Board Schematics and found we can add a coin cell to J45 to retain the RTC time,
and the recommended coin cell is CR1225
Now needed to know few things
1-what are the steps required to setup the internal RTC software side.
2-In terms of hardware we need to only connect the holder and and a coin, right and why the 3 terminal?
3-Will a Non rechargeable coin cell work or we need rechargeable one ?