Are there any disadvantages to using a battery backup (UPS) for my home entertainment system (TV, VCR, etc.)?

Question by laffy4k: Are there any disadvantages to using a battery backup (UPS) for my home entertainment system (TV, VCR, etc.)?
I happily use a battery backup for my computer, and am interested in possibly buying one to use exclusively with my home entertainment system (TV, DVD player, XBox, small computer speakers, video source selector, and VCR). All of these items are currently plugged into a power strip/surge protector.

I like the idea of having all of this equipment hooked into a bat

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