Hi all,

So i have a motherboard with a dead CMOS.

Battery on board is 2 pin Varta 3/60DK

There is an external battery connector but no idea what the pin out is, but it is 4 pin connector with all 4 pins present.

Motherboard in question is the following:
https://www.ebay.co.uk/itm/Opus-PTM-1010-Mini … 353.m2749.l2649

And this link has the only technical information I was able to find:
http://stason.org/TULARC/pc/motherboards/D/DT … 6-PTM-1010.html

So what would be my options to deal with this ? I am in the UK for the purposes of product finding etc.