I perhaps saw those and many similar 12VDC units on eBay.If the receiver you were using was a 12 VDC style then one of these Belkins would make an excellent backup...Of course it won't help with a receiver directly powered with 120 VAC.
Just doing a price comparison of the inevitable UPS battery changes--compared to a 130 watt--the 130 watt, direct 120VAC batteries start paying for themselves over the 12VDC style in about 14 years (rather long payback). $6 less for the 130 watt unit replacement batteries. Though, I didn't lookup how many batteries are in each unit; rather sure the 130 watt unit has two batteries having noted its unit dimensions and having accessed the battery compartment of a similar size unit before.