Bought for my brother who is legally blind to charge his Zen player so he did not have to turn on the computer to charge it up.Little did he know that it wasn't putting out enough power to keep it charged. He thought that the battery went bad and Best Buy Geek squad said the battery was toast and tried to sell him a new player. He is on disability and asked me to see if I could fix it.After taking it apart I realized that there was nothing wrong and plugged it into my computers USB and it was fully charged in hours. It will run over 6 hours non-stop on a charge. Two things I learned, 1. The Geek squad knows nothing about Zen Players.2. Get a second opinion if you go to best buy. Unfortunately, this unit was out of warranty by the time I discovered the problem! No return Lesson learned.