It depends on how big the UPS is. A laser printer is going to draw roughly 600 to 1200 watts, depending on how large it is. Most people DON'T plug them into the UPS; if you lose power it's pretty easy to clear any jam and wait until the lights come back on.
Laser printers can receive too much power from a UPS
Laser Jet
You can, provided that the laser printer has a USB connection and provided that the computer has a USB port and that the Operating System is capable of supporting the printer (it must have the proper "drivers" loaded)
The laser printer was invented in 1969 by Gary Starkweather at Xerox. The first commercial laser printer, the Xerox 9700, was released in 1977.
If you have an HP laser printer, I suggest you buy it directly from HP online store. I find it cheaper to get laser printer cartridges from them for my HP laser printer. If you have a different brand of laser printer, amazon is a good place to start if you're looking for a cheaper laser printer cartridge.
Yes, you can print on vellum with a laser printer, but you should use vellum that is specifically labeled as laser-printer compatible. Laser printers use heat to fuse toner, and some vellum papers can warp, curl, or melt if they are not designed for laser printing. For best results, feed the vellum through the manual tray if available and use the printer’s transparency or heavy paper setting.
RIP.
Laser printers use a drum and toner in the printing process.
Laser
If the transfer paper isn't made for laser printers, then the laser printer melts the paper. You can do major damage to your printer.
A laser printer uses a dry toner powder in a sealed cartridge.
Laser printer is the best printer on all these three categories.