Battery: Built-in rechargeable lithium ion battery
Power: Charging via FireWire, USB 2 (high power), or power adapter
Playtime: 18 hours
Operating Temperature: 32 to 113 deg. F (0 to 45 deg. C)
Storage Temperature: -4 to 158 deg. F (-20 to 70 deg. C)
Relative Humidity: 5% to 95% noncondensing
Altitude: 10,000 feet (3000 m)
History: In February 2005, the second-generation iPod mini came on the market with a new 6 GB model at $249 U.S. and an updated 4 GB model priced at $199 U.S. Most notably, both models featured an increased battery life of up to 18 hours. In addition, they featured richer case colors (though Apple discontinued the gold color) and other minor aesthetic changes (the color of the lettering on the click wheel now matched the color of the iPod mini). Also, the 2G iPod minis did not include the AC adapter or the FireWire cable bundled with previous models. With the introduction of the iPod nano, the iPod mini was discontinued.
History Source: Wikipedia
History Source Address: http://en.wikipedia.org/wiki/IPod