Keep you tunes a pumpin with The iPod iEnergy Backup Battery pack allows an extra 12 hours of playback. The i Energy has three different sized covers making it suitable for the iPod 10 15 20GB iPod 30 40GB and iPod mini. Its so easy to slide your iPod into the case and connect the dock end to your iPod or iPod mini and enjoy music a little longer. It includes a DC Firewire charging cable that charges both your iPod and the backup battery simultaneously when used with the Apple iPod power brick or any PC or laptop with a firewire port. Charging time is 2 3 hours and the LED indicator will be red when charging and green when fully charged. Battery Capacity 850mAh and Full Charge Time 2 3 Hours.