This is amazing, if anyone out there is looking for a great power supply and needs a back-up system then this is what you need. American Advanced Power has made a line of UPS's that is located internally in the chassis. It works great and gives me 50 minutes of run time. I recommend anyone who wants to save space and needs reliability should get one of these. Absolutly incredible i have had awesome results from this UPS. My friends were in awe when i unpluged the computer and it was still running. I got it from AAP there website is http://www.ups2.com , i would definitly check this site out!