Well why i want this is because i m using a laptop, and power for adsl modem is coming from mains, but i live in pakistan, and i m out of electricity for about 5 to 6 hours a day. Now if i m downloading something from rapidshare and my electricity goes, the download stops and all the efforts go to vain, and i have to start downloading again.
Now the ups solution will work, but it will be an expensive solution.
All i want is my modem to work with a battery when my light goes, before i turn on my generator. So my download dont stops.
Hope you can understand my dilemma fully now