Totally worth it. I don’t remember how long they last. Might be 15 minutes. Might be an hour. It’s just a sealed lawnmower battery in a box with an inverter basically but they’re cheap enough (and always going on sale).
I think they also help with brownouts. During rainy season we get a LOT of brownouts. Power outs are less than they used to be, but we still get them a lot. All the freakin’ naples lightning during rainy season. First few storms scare the crap out of me. Actually, I have GREAT RESPECT let’s say for all lighning storms. I’ll stay outside on the porch until the last second at my computer… but when there’s a “flash-boom”, I rush inside and scoop up my laptop with me. smile emoticon