Received the Conair portable Air Purifier and have tried it in a few places in my home since I got it.  I have to say it works better in smaller areas like a bedroom or a bathroom than in expansive areas like an open plan living room or kitchen, but it does work well in those smaller areas.  The amount of time it can be one without charging can vary from a few hours to nearly 12.  The packaging was very eye-catching, it would definitely influence me buying it.