Replacing the batteries in the belkin ups f6c800

Here is a link for the batteries . And look in the yellow pages any computer repair shop should do fine.

http://www.batterysharks.com/Belkin-F6C800-UNV-p/F6C800-UNV_UPS12-7_x2.htm?gclid=CLWpnJeZrbwCFelxOgodOjMA4A

replace it with new batteries.

If the device is over a few years old, then the batteries are probably dead. If so, they can be replaced. Below link shows some photos of the device once opened.
http://www.pcstats.com/articleview.cfm?articleid=1092&page=2

If they cannot hold the charge or do not charge then get rid of the thing and get a new one. Should be much cheaper than when you bought the one you have now.

OK - I'll ask the simple question first, so don't think I'm being crappy...
When you hooked the wires back up to the batteries that were replaced, did you hook them back up as they originally were? (I ran into this problem myself earlier today. I put one of the batteries in upside down and didn't have them hooked up correctly.)
Red terminal on the front battery goes to the black terminal on the back battery, then the black terminal on the first battery goes to the circuit board. Red terminal on the back battery goes to the power supply.
Hope that helps. It sure is a pain the change these batteries out.

Yes they do, around the age you are at is the design life of this type of battery pack, check with your dealer or there should be info re service in your manual .

Batteries are always live, and are very dangerous, so unless you know what you are doing do not try this yourself. If you get it wrong you will be buying a new UPS.

Hope this helps
Thank for using FixYa

This is normal in some lower end UPS's, the voltage can swing quite a bit, a drop of 40 seems like quite a bit but it's out of the question. It will also adapt to what is plugged in yes. Ultimately to test you would want to try it with something like an actual PC plugged in and make sure it stays running. I'd say otherwise it sounds normal to me.

Check the manufacturer's web site for upgraded software on your UPS. This sounds more like a software problem.

http://www.batterysupplyco.com/belkinf6c800unv.html

that´s pretty strange and i would say that the batteries aren´t properly charged, try to let them charging over night without any load. good luck