DESC: The TunePower Rechargeable Battery Pack from Belkin keeps the music playing by letting you power your iPod-even when your internal battery is drained. It's a great solution for long plane flights, hikes, or for anytime you don't have access to an AC outlet. For your convenience, we've included three sleeves sized to fit all iPod and iPod mini players with dock connectors. The TunePower provides 8-10 hours of additional play time on all iPod models and it features a power-level indicator, so you can tell when your batteries are running low. The compact design fits easily in your pocket or carrying case so you'll never be caught without your tunes again.