Low voltage Warning - battery replacment

[a-10tankkiller]

I'm getting a Low voltage Warning when I start up and I'm thinking I need to replace my battery, but am wondering if there is anything else that maybe the source of that warning. Also, is there anything I need to worry about when replacing the battery? Can I just take out the old and put in the new, or do I need to back anything up first?
Thanks

[ray]

Replace that CMOS battery that's on the motherboard. In the past I never had to back anything up, but if you have changed any of your BIOS settings you'll have to set them again after the replacement.

[_=DeltaForce=_]

Well the Bios will usually get wiped out when the battery is taken out but certain latest motherboard can store settings

[a-10tankkiller]

I wrote down all the BIOS settings and replaced the CMOS battery. All the BIOS settings were unchanged, and I guarantee that had I not written them down they would have all been changed and screwed up. :) Thanks for the thoughts on the topic.