Your motherboard is using the M48T86PC1 IC, a 5.0V PC Real Time Clock. The backup battery will be good for 10 years of data retention and clock operation in the absence of power. The backup battery is inside the IC, nothing can be done to replace the battery. You could replacement the IC with this one DS12887.
yep I found a 24 pin clock battery on ebay of the same make for 7.00 $, anyway Is there anyway i can remove the old ic and solder this one in? I know a guy who experienced in soldering.