An UPS is what it is. It's designed to maintain power for a short time so you can do a graceful shutdown to your devices. The unit you linked to won't power them for any period of time. We lost power this past weekend and I was able to hook a TV and DirecTV to a jump box I had with AC input plugs. Worked great for a couple of hours and I even hooked a lamp in. I picked it up on Amazon for around $80. Does a great job jumping the cars too.

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99 ML320
94 SL600
92 SL500
95 E320 Cabriolet
87 560SEC
86 300SDL Grease Car
80 380SLC Euro

13 Fiat Abarth
02 Maserati Spyder Cambiocorsa
00 BMW Z3
90 Rolls Royce Silver Spur
80 Ferrari 308 GTSI
88 Jaguar XJS12 H&E Edition
99 Land Rover Discovery