din said:APC has it, but cost will be high. Better to contact people who make UPS in your area. I am using Safepower UPS (I think its only in Cochin, Kerala). I get 6 hr backup for 2 PCs. Also, battery and other componetnt prices has been changed (increased) a lot recently, so you will have to spend more ...
Yes, my UPS has big batteries.utsav said:for getting such backups,UPS needs inverter batteries