Apple has introduced the second generation iPod nano, which is encased in a thinner aluminium body and offers 24-hours of battery life for a single charge.

The company also raised the maximum capacity of the music player to 8GB, and tweaked prices so customers can expect twice the capacity for the same price as previous models.

The new nanos carry a Click Wheel and are available in silver, pink, green, blue and black. They also support gapless playback.

"iPod nano is the world's most popular digital music player, and we've completely redesigned it to make it even better," said Apple CEO Steve Jobs, Apple's CEO.

The new range offer brighter screens and let users search through their iPod's music collections alphabetically. Also new is the Quick Scroll feature, which lets users move between first letters of the alphabet when scrolling for tunes.

The new iPod nanos are available now: The 2GB silver iPod nano is available for £99; the 4GB model (available in silver, pink, green and blue) costs £129 while the 8GB model - available in black - costs £169. All prices include VAT.

The company has also updated its range of optional accessories for the second generation iPod nano, ushering in: lanyard headphones for £25, armband for £19, iPod nano Dock for £19, and an iPod USB power adaptor for £19.