Mass Storage MP3 Players: Battery Life

When you have more than 100 hours of music on one of the new hard drive-based MP3 players, the battery life of the device becomes important. The newer iPod Video devices will play over 20 hours of audio and up to 4 hours of video. The biger the storage, the more likely you will use the device, and therefore, longer battery life is important.
In order to insure that you get the best performance out of the battery, it should be charged to 100% as often as you can.