What do you mean by "battery as backup source, came installed in it"?
Are you talking about the little coin CMOS battery that comes in every motherboard, or something else? If something else, what?
Are you referring to a UPS battery backup that you plug into the wall and then plug your power supply into the UPS backup instead of the wall?
If necessary, please post a picture of what you are talking about.
Posting images on any thread in our forum is a relatively easy process, although some people tend to have problems doing so. Please read the FULL tutorial, or else you likely will not have success linking to a hosted image and will end up simply posting a link to an image elsewhere rather than...
forums.tomshardware.com