I need to make a mobile workstation for my job and I was wondering if there is a product out there that functions as a battery that I could plug into that would power a desktop and a printer. Alternatively I could use a guide to making something that accomplishes the same task. Ideally this item would be able to charge without interrupting the power to the computer, and it would have enough battery to be used for 20 minutes and up on just battery power.
Edit: Its probably going to be an dell optiplex unless I can get the ol bossman to let me build something, run of the mill inkjet printer