Well, I got hosed by not reading reviews before I purchased. The reviews state this, but not the product. Anyway, the whole reason behind me ensuring it can be plugged in, is to make sure it is reliable. However, this logic is completely lost on the designers here. The pump ceases to function when a power cable is attached, and an eight hour recharge time when depleted. Also, please take notice that the pump is not much bigger than the electrical plug; should be an indication of how much this thing is going to inflate on a single charge. And remember, they charge only goes downhill after use. This product is only for stocking stuffer type gifts, where you really don't expect anyone to need to use it; you only get it for the thought of saying you didn't forget about them....Bottom line, this is junk I would not spend Skit Ball tickets to get. Bad on me for not reading the reviews, I knew better.