Asus TXP4 recycled as a gateway

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

It's equipped with a K6-200
I've been using it for two years as a gateway, an USB ADSL modem is
connected to.
Run under Win98SE with the Internet Conection Sharing. All PCs in the
network are fine with it.

The problem is that this board ever lost the date. Sometimes it looses the
setup. Mainly in summer (below 30 °C however)
Cleaning the battery contacts and replacing it generally cures the issue for
some weeks (months in winter).
The C-Mos battery voltage doesn't drops below 3 Vdc.

I'm tired to maintain the battery and would like solve this problem. Any
clue ?
Thanks