It works fine. And you can add external capacity easily

Tried it a few times in the few weeks I've had it and found it to be terrific. I have a few of the smaller Black and Decker (10 and 20 VA) powered inverter modules that were clearanced for $10 at our neighborhood Home store that got me curious about this thing. Heck no, it's not a generator, and yeah, it's basically a flashlight about the size and weight of a cinder block, but the combination of radio, flashlight, clock and THREE 120 outlets would certainly be handy in a blackout. The Mfr recommends leaving it plugged in (charged by a little wall-wart transformer) all the time to keep the battery topped off.

Did somebody really say they wished the LCD clock could be turned off to save power? Nah, even an AGM battery will discharge with no draw at all WAY more than that little clock would - the difference has to be insignificant. And far outweighed by the convenience of having the clock stay set.

Now how about some superbright LED's in the handle? Now those could be normally-on so you could find it in the dark, but switched so the light wouldn't bother you if you were sleeping near it or something like that. They say the built-in 5-watt flashlight will run FIFTY hours straight on a full charge, so I'd guess that a few 20,000 mcd LED's would draw 5 ma each, and the unit would last for months (maybe years) between recharges. Of course, an AGM battery shouldn't be stored discharged (thus the directions say to leave it plugged in with the little charger going all the time) but if one stayed lit while it was charging, you could find it, and if the power went out, the bank could go on full by default and actually light up the area around the unit.