content: I've had this product for about a year. The readout that tells you how much charge is left never worked!When I first got the product, the readout didn't seem to work according to the directions, but it took me some use to figure out it didn't work properly. I could find out how much charge was left, but it didn't display the info as the directions stated. The item is so heavy and bulky, I decided not to bother returning it and just live with the inconvenience. . .Now, after three or four camping trips worth of use, the readout doesn't work at all! There's no way to find out how much charge the unit has remaining. I just have to find out when it dies. Not very convenient at all.