The problem with the A4000 motherboard, from what I've read, is that it has three connections with the motherboard, and you need to add a resister when replacing the battery with a battery holder style one, but I can't find details on what is needed.

I'm not really that bothered with the system keeping time as I can quickly reset the clock when i use it, that's not a problem. I just want to make sure that if I remove the battery from the motherboard that the system will continue working.