I live in an old house and especially needed a humidifier with a rechargeable battery for a room I use frequently. It was by far the biggest I could find. At the highest level, the tank lasts over 8 hours; It's easy to use; the light is bright (has multiple brightness settings); and it seems pretty reliable even though I've only had it for a couple of weeks. Unfortunately, you'll need to plug it into an external charger if you want to use it overnight, as the battery only lasts 1-2 hours. I'm giving it four stars because it works well and is exceptionally user-friendly with lots of useful features. (for a humidifier), but has a short battery life.
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